Here's the situation:
There's a guy on one of the other regular forums I post on. Its an American forum so mainly Americans and Canadians and I've been posting on there for years so know the community well. The guy has been banned from most of the places we've posted in the past, now we post somewhere new he's turned up again.
He has a history of being racist, misogynistic and just all round strange. The latest in light of what's happened in America is him starting a thread wondering if he could be a serial killer in the future because he had a lot in common with the childhood of a former serial killer.
He's in his early 20s, and apparently still at college.
You can be anything on the Internet, we all know this. I guess my question is how should you interact with people online, we can't always be super nice and like everyone. It's actually ok not to like people, it's a defense mechanism that could save your life.
But conversely you don't know how vulnerable or what emotional state people are in. A good recent example is the hoax hospital call in the news.
It's a virtual minefield 
Edited: 17/12/2012 at 19:27