"for those who would like it, why not?"

Cause it's not really worth the effort to code JT...

People have asked before, and been told "Just ignore them yourself"

Mudcat has bigger fish to fry in my estimation...

I mean, sure.... If there was a 'filter' I could attach to my 'cookie' that'd allow me to permanently 'ignore' certain user names, I'd use it myself... But I'm not gonna hold my breath on such a specialized feature ever coming down the pike...