Joe Wikipedia uses a slightly different definition:
a troll is a person who sows discord on the Internet by starting quarrels or upsetting people, by posting inflammatory, extraneous, or off-topic messages in an online community (such as a newsgroup, forum, chat room, or blog) with the intent of provoking readers into an emotional response or of otherwise disrupting normal, on-topic discussion, often for the troll's amusement.
As we cannot know for sure what motivates a particular post we similarly cannot define the intent, but superficially there would appear to be a few posting here fit the bill.
But at the end of the day making unsubstantiated attacks on people by attaching unwarranted labels is a sure fire way of getting a response and quickly terminates a thread. It really does not matter whether you want to label it trolling, stupidity or a personal attack