Because battle of the alpha male :v یا female cos equality :LL یا سٹار, ستارہ cos tumblr. Who would back down from becoming alpha star? Fanpop be like the animal kingdom. سب, سب سے اوپر user gonna get آپ all the betches. Alpha fanpopper gonna دکھائیں their manliness. Alpha fanpopper gonna دکھائیں dominance and make wallposts and polls. Bitches love wallposts and polls.
Cuz people respond to negativity with مزید negativity. Sad, but true. Even I'm guilty of this. It's not just Fanpop, though. آپ should see YouTube تبصرے یا IMDb message boards (before they decided to shut down the boards, of course). YouTube and IMDb have the worst people, though Fanpoppers are no saints, either.
It is not just Fanpop. آپ will see fights pretty much everywhere. On other websites too (which I have seen far worse) as well as in real life. Not everyone can get along with each other. If آپ want a specifc reason it varies. Some just do it for fun, others because they want to get out some of their tension as there are also those who get offended pretty easily یا for no reason etc. Either immaturity یا mental condition on a specific moment can play a crucial role in that !!!!