What I've learned in nearly seven years on GlockTalk is that there is a cabal of cops and cop fan-boys that includes RussP, Bull Lumberg, Dragoon44, TheeBadOne and others. If you say anything negative about cops, especially in the forums where RussP has moderator privileges, they WILL gang up on you and if you fight back Russ will find an excuse to lock the thread for being uncivil and bitching about cops.
The guy who stopped you was way out of line. I've been stopped for expired registration while carrying before, just like you, and there is no need to undergo what you went through. It's very frustrating for me to constantly read the "cops can do no wrong" like from a crowd that clearly enjoys moderator support.