It turns out that emoticons are considered a symbol, so they can beef up your passwords and make them more secure in combination with letters and numbers. Here’s how.
Mac os and windows? I haven't seen it on my Mac but maybe on windows? Those are pretty modern. I haven't seen it in Linux either now that I think of it.
As it said in the document: With a little help from your OS. So I want to log into lemm.ee from another persons computer. I do have not my own keyboard, I neither have my additional drivers or extensions or whatever. Oops. No login.