Things have changed. Nobody cares. Over on the Real Deal, Kenji Gallo has posted a bit on his views on why he thinks this is. Its in a large part just opinions, but like PB has said, there's not alot of sense in going after guys that have already done their damage and moved away.
Its my own opinion that anybody dumb enough to get done by Chris "Paciello" Ludwigson probably deserved it anyway.
It tells you something about the current state of things that nobody bothers, though. Sure it might be different if he was hanging around the old neighbourhood spots, punking wiseguys and such (Hey! Remember me, fuckers?!? Whaddya gonna do, eh?) but what wiseguy today is gonna risk going away for life just for the satisfaction of knowing you killed some rat. Most of the damage he did is well in the past now. The guys he didn't hurt wouldn't give a shit anyway.