Bernard, yep. Although when you're looking for signs of trolling, they're pretty transparent. Of course, if you're REALLY looking, you can find them in comments other people made perfectly innocently.

Perhaps the best attribute to have around here is an open mind. We think we've figured out what a person might have really meant. Sometimes we're right, but we've got to be equally accepting of the possibility we're wrong. We can jump in with both feet, treating our perception as reality, and perhaps have to apologise later, or we can wait for more information. Trolls usually get more and more obvious the more they post - perhaps one big reason for them not using a consistant identity. Writing style, as well as tactics, pet hates, and favorite words, can be distinctive. It's just a fact when humans communicate, some small bit of who we are comes through in our words.