Why are bad sports allowed to play?

Chess.com isn't exactly allowing it, TexasRookAttack, in fact they have rules in place that forbid such aggravating behaviour.

But I guess the truth is that with millions of free accounts, they simply cannot police every line of text. It would mean a huge effort for them and have almost no effect because free accounts cannot be effectively policed anyway.

Weclome to the internet! 

Where annonymity gives people as much bravery as beer.

I understand TexasRookAttack.

I repoted the user paumagal for calling me a c*nt and telling me to die (I sent the the screenshots to chess.com staff ).

Nothing happened, he is still on chess.com, much to my displeasure.  I wish these people could be nicer.  

I understand your frustration. I ignore messages during games. Some people try to upset you, I think, to throw you off your game. It's the same reason some people use offensive avatars. I just try to enjoy the games and block offensive users after the game is over.