Suggested & denied before.
http://forums.d2jsp.org/topic.php?t=24088166&f=39&o=200Quote (njaguar @ Mar 18 2009 05:31pm)
Always use a mediator. Any user smart enough to search first also should be wary enough to use a mediator if in doubt.
There are no plans to implement something like this, which would only lead to more fake accusations to attempt to defame users.