The signature thing was probably a mercy ban. This thread is getting huge, and the shorter the posts, the less likely the peoples up top will execute it before we (never) get bored with it.
-Twi
No, it has always been a concensus that forums which allow stupidly large 'signatures' or postscripts to comments end up destroying the sense and continuity of the thread. Once you have seen some ego-centric dissertation on 'ain't-my-computer-specs-just-fantastic' stuck at the bottom of every other comment/reply it gets VERY OLD VERY FAST.
Users' comments on Stardock's sites/forums have space/place-holders at left for avatar, name...member number...join date, etc.
That SHOULD be sufficient.
There IS NO NEED to also 'sign' a comment. It's redundant.