You can bet that if we had shown up packing openly that the MSM would have said !!!20 MILLION RIGHT WING ARMED TERRORISTS!!!
Maybe as an intermediate step,
the next nationwide rally will have signs with nothing on them but drawings of pitchforks and torches.
As a matter of fact, that gives me an idea.
In addition to your cleverly worded signs, bring the pitchfork/torch signs,
and on cue, everyone puts down all signs except the p/t signs.