Trouble makers are people who join communities for the all the wrong reasons. It could be someone pretending to be someone else, or someone that uses the community in order to perpetrate a scam, or that uses the community as a platform to defame or discredit someone else they have had a personal disagreement with, [...]

Reputation is an extremely important part of any community, and online communities are no exception. In fact in the case of online communities reputation is arguably more important since it is that much easer to hide your identity online. A good example of an online community with an explicit reputation management system is ebay. After [...]