Yes, there are people that are so insecure that getting attention on an internet forum is a balm to their fragile egos. They are like little children that misbehave because they want/need attention. No matter whether it's "positive" or "negative" attention, as long as someone is paying attention to them, they feel a little better about themselves.
I find the best course of action is to identify and ignore these people. It's a phenomenon that occurs on many forums.