Any way to remove the last said text message?

If you type /info as a chat command, is there anyway to remove just that from showing up in the text messages? But still have the info come up?

I can't seem to find anyway to do it....

i imagine you can make them not be able to talk at all (others can't hear) and then make transmission each time someone types something in.

So if someone types in a non command like "I pWN j00!!11" I would have a trigger that intercepts it, and says it to everyone? and if you typed in /info it would only show up on your screen? If that isn't what you meant, its a good idea. :D