The Huffington Post selected their favorites, and I selected mine from theirs.
Some of these are unwittingly funny (the signholder was displaying their ignorance); others were, for lack of a better phrase, "sign-crashing"; others were just plain clever (especially, it seems, the ones for gay rights/Prop 8 — I'll leave it to you to figure out which ones those are).
See HuffPo's choices here. Mine, in no particular order, are:
The rest are below the fold….