I've been expelled from Stack Overflow solely because of my pursuit of quality. Beside many other things (like title and tag editing, finding dupes, etc), I tirelessly chased people who wrote bad answers, and naturally those people bombarded moderators with complaints.

So moderators decided: as it's impossible anyway for just one person to drain this Stack sewage that overflows with misinformation, outdated practices, wild guesses and all sorts of harmful content; and as it's much simpler to ban one truth-seeker than hundreds of rep-whores, then this one should be banned.