a member of a chatroom I frequent is annoying and uses obnoxious Quit messages.

He is on Ignore, so only thing I see are his:
* XXXX has joined etc."
and his
*XXXX has quit etc."

Is there a way to eliminate these also.
Maybe something like when he joins or quits the line is printed in white so it's invisible against the white background?
Or maybe someone has an even better idea?

Really appreciate it. Thanks in advance.