Can the people ignored know who is ignoring them or not?
No.
Neither can Mods.
yeah, but we cannot ignore you and Nick
(but I cannot imagine why I would want to ignore Nick)
![bleh <.>](http://www.aussiepinball.com.au/Smileys/classic/bleh.gif)
EDIT
the other bummer is if somebody quotes the ignored user, you can then read the post