Thom Hartmann on the Tuesday, May 25, 2016 "Big Picture" TV program said something like:

"When trolls, or just people with nasty personalities, come on my site, we notice participation and traffic goes down."

My response:

First, how can you be sure the words you interpret as "nasty" are really nasty? Words are signs, symbols; you are making a connection between a word and "nasty" but the author may not have made that same connection. You are assumning a lot and the danger is you made a mistake.

Good trolls disconnect words from traditional, immediate emotional attachments, opening up new interpretations and directions for inventive thought. When you react in the predictable way, by failing to see beyond your immediate emotions, the joke is on you.

Second, do you really want your site to be an insular echo chamber of "sugar, spice, and everything nice", for ratings? I guess I didn't figure you for a hit farmer ...

Third, banning words on the internet is an admission your words can't compete, on a level playing field. Your memes lack survival fitness. Censorship is an indication that something in your reasoning is purely emotional, a leap of faith; you can only defend that leap by silencing disagreement using prior restraint of speech.

Banning trolls is like antibiotics: you breed supertrolls. Proof: Donald Trump.