IgnoreMore

IgnoreMore will:

Let you ignore more than 49 players
Share the same ignore list between all players on the same realm (and faction).
See when someone was ignored
Give a reason for why the person is ignored
NOT respond with “X is ignoring you” (unless the person was initially added to the system Ignore list before IgnoreMore was installed)
The “/ignore” command is also extended with a second parameter giving a reason directly, e.g.:
“/ignore Mikk : loudmouthed guy”.
You can also double-click lines in your ignore list to edit these comments.