Selling life-saving drugs at large multiples of the cost to manufacture + distribute. The most obvious example being insulin.
Switching political party in the same term that you were elected to office.
CEOs making 100x the median worker at the same company.
Assault rifles and other automatic or military-grade weapons. They have no practical purpose in the hands of a citizen. Pistols, shotguns, and hunting rifles should be sufficient for hunting and self defense.
Generic finance bro bullshit. Frivolous use of bank credit for speculative investment. Predatory lending. Credit default swaps. It's just a spectrum of Ponzi Schemes. Let's reinstate the Glass-Steagall Act.
Non-disclosure of expensive gifts to Supreme Court judges. Looking at you, Clarence.
Military recruiting at high schools.
Junk mail. You literally have to pay a company to stop sending it.
Something (almost) no one has mentioned: factory farming of livestock. I'm not gonna say a person who engages in subsistence farming shouldn't be able to keep a coop of chickens for eggs (as long as their chickens are well cared for), but large scale animal husbandry and livestock is devastating to the environment and genuinely cruel.
Tracking & profiting off it.
Forcing people to be tracked to use a product that they then sell that data should be illegal without your complete, informed consent, and you get to opt out and still use the product.
All tracking should be regulated. You own your personhood 100% and only you can make money off of that.
Zero hour contracts in the uk don’t actually have to have an actual contract so if your boss says that something is in your job description you can’t argue otherwise because there was never a contract that said what your job roles were to start with.
EDIT: also i read the other comments and hilarious amount of other things mentioned also boils down to "capitalism" or their illegalisation would basically needed for capitalism to be outlawed too.
A 16 year old who just got their motorcycle license being able to buy a 200hp superbike capable of doing 180+mph.
For all intents and purposes, this should be illegal, because the teenager (usually) doesn't have the skills and willpower to handle such a powerful motorcycle as a noob.
But it does feel awesome to be able to buy whatever motorcycle you can afford once you get your license in the US, rather than being forced to start on a 125cc that can't even hit 60mph.
Smoking. It's literally a drug and causes lots of health issues like increased lung cancer risk, but the worst part is that if someone smokes near you then you also inhale some of the toxins even if you yourself don't smoke. And in my country it's common to see people smoking on the streets. Combine this with air pollution and yikes
Governments, businesses, corporations and all of us just normalizing and accepting that the majority of everything we own or buy at affordable prices are all based on taking advantage of as many poor people as possible in our home countries and most of the time in third world developing nations where people are paid pennies for their work.
We complain about China, yet everyone buys everything from them. We look down on third world developing countries yet we base our economies on manufacturing a ton of stuff from them because they all hire people for as little as possible. In America, Canada and Europe, we have agricultural workers we ship in from poorer countries to harvest our crops because we don't want to pay higher prices for labour to the people that live in our countries .... we would rather pay poverty wages for imported labour that we don't want to stay in our country.
Everything we do, buy and pay for is all based on exploitation ... our entire economy the world over is based on it ... yet it is perfectly legal ... but if we are all so moral, enlightened and intelligent then it should be illegal.
Removing AUX ports, forcing people to throw away their headphones, because you ALSO nowhere sell your overpriced USB DACs.
Climate Destruction
Stealing already existing nature land, forcing people out of it, and "taking care of it" and get carbon credits for it like what?
Mine Coal or Oil in 2024. Same with building nuclear plants.
We had a thing in Germany, where nuclear industries needed to pay for the disposal of nuclear waste. Instead of calculating real numbers, they should invest ⅒ or less of the actually needed money into trust funds. Like... what? Money doesnt grow just like that, it comes from exploiting workers, and "magically" they didnt need to pay that much. And of course that was too little so now the tax payers have to pay for these horrible companies.
Half of the things that go on with donations. People who are enlightened enough to know 90% of your money doesn't go to its intended place (whether you're donating to starving Africans, people with a medical condition, etc.) cannot effectively stand up to corrupt charity organizations in a culture where half of the people still think the Salvation Army is a literal branch of the army. Even the charity watch groups are compromised.
Let’s say you need to borrow 5000 € for your first car, but you have only 700 €. First, you’ll need to find a lender who is willing to share the risk with you. Then, you form a joint stock company (Tom’s Volvo C30 2008 incorporated), where you own 7/50 of the car and the other party owns the rest. When you have some more money, you can buy some more stocks. One day, you’ll own the whole car and the lender has all of their money back.
Flying planes. A few months ago, I got to do take-off and pilot a bit in a tandem plane. Being in a small, single-engine 1969 plane instead of the typical jumbo jet--I realized it was literally just a shitty old RV inside, shag carpet, rickety little passenger window, and all. Except for one minor difference: we were soon IN THE FUCKING SKY. That's when I realized humanity has no place being up there, with all due respect to John F. Kennedy, NASA, etc. And a little sidenote to those same scientists: a giant metal object ascending into the sky makes no sense--I don't think it can last. It's the folly of man. Oh, and you can just have a plane!? That's allowed somehow!?