Left rule

in germany driving around pointlessly is illegal i think
- I mean, it's Germany
- It is, but you have to do something really abstract, like this meme, to not be able to come up with some excuse that nobody cares to verify.
  
  I wonder if it came about in the times when fuel was very expensive. A German physio I used to go to, told me when he was a kid they would have car free Sunday. Everyone walked or biked and the roads were full of pedestrians, it certainly would have cut 1/7th of the fuel usage.

A cousin and I have been competing for years to see how many times around we can go before we either stymie another driver or get pulled over.
I'm currently winning at 43. Neither of us have ever been pulled over, it's always some irate grandma who refuses to enter even though I give her plenty of room.

A dew days ago ist saw an older Dude in a Bike, taking all the left turns in one of our roundabout. (Germany) I know that he rode for at least 3 hours. He wanted to reach 200 rounds, i think. Hope he made it.

I feel like if a cop came by a few times and saw you still going around they would probably pull you over just to see if you're having an episode or something, then probably tell you to go home. I think you'd only really get in trouble if you were a dick about it.
- Imagine a lights and sirens pursuit around a roundabout.
  
  I will, as long as I can imagine it set to the tune of Yakety Sax
- I definitely think they could get you for endangering others, or something like that. I don't think it's explicitly illegal, but I'd be surprised if it isn't implicitly illegal.

If you confuse and distract other drivers, that's endangering traffic and police will remove you.

I remember someone tested this. They lasted like eight hours until some neighbor called a cop
- Snitches get stitches.

Despite what many people think/have heard, most places do not have a specific law against doing loops in a roundabout. And when they do it is often a local ordinace(mostly small towns trying to prevent a local car community from driving up and down the main street all night). Although other laws or regulations can apply depending on circumstances.
Things like impeding/obstructing traffic, careless/reckless driving, noise ordinance, etc. But if you're driving around one in an industrial area at night, the worst you'll get is probably some accusing questions and a "warning".

In my country it's forbidden to drive in the roundabout for longer than necessary to reach the desired exit.
- Time is the 4th dimension right? Could you argue that you are trying to react the location of the exit at a specific location in time, therefore you have to make extra circles to reach your exit.

I don’t remember where but I remember seeing a youtube video where someone did this but didn’t call attention to it
Like they were driving in a roundabout and just kept going around and around, then a jump cut to when they finally exited but like it was clearly much later because the sun was down. They had to have been in it for at least a half hour or so

I'm not entirely sure here, but I think, I saw something about useless driving around as a law around here
Which would fall into this ground, I guess...