Yes! I've already gotten about 2/3 of my friends to stop playing their games. I'm working on the last third - after I get a couple key people off I can quit for good.

That's good to hear. A lot of people are unwilling to give up even the smallest things despite talking very strongly against some companies.

Yes. I played League on Linux before they imposed anticheat, and stopped immediately afterwards.

Quitting Riot games was one of the easiest things I've ever done, especially now that Deadlock lets you make lobbies.