A system and method can detect and/or prevent profane/objectionable content in forums/communities with community based or user generated content. The system generates and provides a disallowed variants dictionary, which can be constructed based on a misuse table, wherein the disallowed variants dictionary contains a plurality of variants of one or more disallowed words in a community based or user generated content. Furthermore, the system checks each word in an incoming message against the disallowed variants dictionary, and determines that one or more words in the incoming message are disallowed when there is a hit.