IMHO, it is best to remove any and all bumperstickers, cutsie license plates, etc etc due to the aforementioned incident. Cops don't have much of a sense of humor as well as other parties may not like what is being said. think "vanilla" and life can be smooth....... Same thing for shirts bearing the name of a sports team, political signs and/or bumper stickers, etc etc.

Stand for nothing, be sensitive to your neighbor's needs and wants.