There's really no way of preventing a fandom, though. If it's going to happen, it will happen...
I really like this webcomic, and I can say I'm a fan, but I don't plan on pushing it onto people... I might mention it if it's an appropriate time, but that's pretty much it.
Also, I've never really noticed the Homestuck fandom to "push it onto people"
Disliking something because it's popular isn't the fan's problem, it's just intolerance.