Well, if you say that Racism and Sexism is fine online, then you're an ignorant bastard.
But if you say that Racism and Sexism is not fine online, then you're a conservative asshole.
Soooooooooooo..........I guess I think that Racism and Sexism aren't okay on the internet?
It all depends mainly on the website/online service you're using, if it's lenient and doesn't mind a racial slur every now and again then curse away you bigot you! If it's strict and doesn't appreciate any kind of racism at all or something then you're a troll you bigot you!
Obviously, blatant Racism and Sexism ("LOL, urs a fuckin' niggha, we slavze yo asses!" for exapmle) is never acceptable, there's something called common curtosy that even the internet shouldn't be free from. Just because you're anoynemous doesn't mean you have the right to say anything you want unless the website/online service allows it.
For example, the Escapist encourages free speech, but it's not a place where you can say whatever you want. If you get off the handle with your slurs, you would get banned. If you'reo n 4chan, however, you'd probably get off just find (at least on *coughcough/b/coughcough*).
Sooooooooooooo.............it depends.