Anti-fans and the role they play in K-pop

I know my topic title lends itself to a wide scope of topics, but I just wanted to throw a thought out there.

Recently, Lim Yoon Taek, the leader of group Oolala Session, passed away after battling cancer. If you don't already know, Oolala Session was the winner of Super Star K3 (by a landslide, in my opinion, but that's for another time).

Why is this post related to anti-fans? As he was battling cancer (stage 4) and performing, people wrote remarks saying how he was just faking it so the group could win, how it wasn't as bad as he claimed it was, asking why he hadn't died already if it was that bad.

Prior to his passing, Lim was on the show "Win Win" talking about this, and how he wished that it was true. That he was just making it up, because who would want to claim they had stage 4 cancer just to appeal to fans?

This got me thinking about the wider issue of anti-fans and the remarks within the culture of K-pop (in the past, I had mentioned this is not only in K-pop culture, but in fan culture around the world). As previously discussed, in K-pop, closeness to the fans is an important aspect, through variety shows, fan meetings, ect. Even moreso now with social media.  But the opposite end, of course, is the anti-fans. The ones who are passionately against you, wanting you to fail so their favorite K-pop artist can succeed.

But to what degree do we find this acceptable? Is it okay to say cruel remarks to artists because they are in the spotlight? Daesung from Big Bang came on a television show "Healing Camp" and stated the shock he felt when someone called him a murderer. We saw the impact that it had on Tablo and his family. So this begs the question, do we accept the bad with the good? And what is not acceptable to say, or is everything fair game for a celebrity? Just part of the reality of fame and fortune?