why not just ignore 'em without a button?  youse guys know that, after 10 yrs., they aren't
likely to do it.  "ignore" is more for chat rooms, when pervs are buggin people IMVHO.
"ignore" is more for dumpsites with cliques, like this place might become if they allow
the cliques to start up again.  e.g. I don't interfere with the luxrender threads because I
dunno anything about luxrender, but I don't ask that they be moved to some luxrender forum.
let anyone who wants to post anything in their poser forum do so, within their TOS.
the idea is to encourage the mental stimulation that they may derive from these exercises.

best solution if users are buggin - open up one's own site where one can be in charge of something,
then exclude the "ignorees" who are causing all this tribulation.  this has been done with some
success by several prominent users.

 I'll vote for "ignore button" if they add a CSS rule to allow flash animations in forum threads.
it can be done now, but is not thread-specific AFAICT.