...how the hell do these creatures know which registrations are Democrats and which are Republicans?  It's because you have this "registering as" thing, isn't it?  I know you need it to run the primaries, but I always thought it was sort of creepy, and now I'm convinced it is.  

A quick remedy would be to encourage everyone to register as a Republican; you can change later if you need to.  The scum willl probably switch to tearing up everybody's forms, but it's something, at least.