Does the behavior of other fans or media ever affect how you feel about a player? Even though you may not have anything against the player personally, and you may try to not let it get to you, but there's a part of you that will start resenting or disliking a player because of annoying fans or media.
Personally, it won't change whether I like or dislike a player, but if I already dislike the player, I admit that annoying fans or media will often exacerbate that dislike.
Or, if I'm indifferent to a player, I'll sometimes want them to lose because I think, "if s/he wins, I'll have to put up with..."
If the obnoxious fans or media are for a player I like, I often
because those people tend to make the rest of us look bad and cause a backlash against the player. That's why I often don't get why some fans will defend the irrational fans just because they like the same player.
I don't usually bother going on forums for individual athletes because I find the whole "group think" aspect annoying.