If the scariest opponents are the ones who premove everything and don't even seem to care what moves they make, it shouldn't be considered legit. And that is how it feels to me when I"m playing 1|0.
When someone premoves everything, you are almost forced to premove to keep pace with them. In a normal game, you can use your opponent's time to think of your next move. But for constant premovers, it just doesn't work.
Okay, I completely disagree. Bullet is just speed chess, but games like 5 min blitz are way more fun to play, and can also help you find tactics, checkmates, etc. faster. Some people don't have the time (or patience, in my case) to play longer time settings. For me, if I want a legitimate game, I play correspondence (mostly on a different chess site though).