A troll is someone who goes online to just start arguments, annoy people, provoke a response in people, for fun. A bit lame, these people clearly don't have much going on in their lives. The 'Water Army' - "In China, paid posters are known as the Internet Water Army because they are ready and willing to 'flood' the internet for whoever is willing to pay. The flood can consist of comments, gossip and information (or disinformation) and there seems to be plenty of demand for this army's services." Finally, spam is that annoy mail you get for viagra, porn, lottery wins or Nigerian fugitives or whatever that fills up the junk folder of your e-mail account. A spammer is someone who sends this, or posts it on message boards.