It's in the CVS, third commit from top.http://planeshift.cvs.sourceforge.net/planeshift/planeshift/docs/history.txt?&view=markupSo the system as I posted it is implemented.
Quote from DaveG: I've said it before, and I'll say it again, please don't blame the game when you screw up.
Tarel, Bereror has already done work on this. ThomPhoenix, it's all on the server. No one has access to those last 50 messages stored, so there is absolutely no way to modify them.