That would be an awesome feature to have though! Wouldn't it? Although it would create cliques and seperations within the forums as well. I can see why it is not something in affect.
Other forums have this. vbulletin, for instance. The code is not hard to implement at all. Rather basic actually. If I was coding it, I would have three levels of ignore, but that's just me.
a. PM traffic
c. Entire threads.
Clearly Sony doesn't want it activated.
I just though of this.. if we self moderated all the people we don't like off of the forums we see... the mod team wouldn't have a job! I don't want them to be unemployed. Save the mods! Keep it as is LOL!