Flaming is a hostile and insulting interaction between Internet users, often involving the use of profanity. It can also be the swapping of insults back and forth or with many groups teaming up on a single victim. Flaming usually occurs in the social context of an Internet forum, Internet Relay Chat (IRC), Usenet, by e-mail, game servers such as Xbox Live or PlayStation Network, and on video-sharing websites such as YouTube. It is frequently the result of the discussion of heated real-world issues such as politics, religion, and philosophy, or of issues that polarize sub-populations, but can also be provoked by seemingly trivial differences.