The term 'Internet Forum Menace' is often used to describe a person who posts inflammatory, rude, or offensive comments on an online forum. This type of person is commonly referred to as a 'TROLL', which is a five-letter word that can be used to summarize this term. Trolls often post messages with the intention of provoking an emotional response from other users, and can be disruptive to the overall atmosphere of an online forum.