I would like to suggest that blatant lying be added as a prohibited action on the forums in the official forum rules.
There are some forum users who will blatantly lie about their actions, the actions of others, how situations happened, etc.
This affects people both ICly and OOCly in various negative ways.
It is childish and adds nothing to the game or forums, and only takes away from the positive things here.
Some lies can very, very negatively impact game players - such as giving false information on how a class compares to another class (for example: let's say I give information that a monk will never, ever be able to kill an Apostate or Infernal because of game imbalances. This is an outright lie, as monks are VERY capable of killing both of these classes. Let's say I was a new player that had been thinking about playing, or even playing a monk - now I don't even want to play, much less a monk, because someone blatantly lied on the forums.)
My idea is that if you think a user is outright lying on the forums this should be a bannable offense. This should also include when the original forum poster has been corrected and continues to post their incorrect information.
The forums should be a positive place where new and old players alike are not given incorrect information on a daily basis. It is very disgusting to see some players repeating things that are not true on an hourly basis, and representing these not true things as "facts".