The bumper sticker retaliation thing is just one of many interesting little asymmetries between liberals and conservatives that don’t get talked about much but are very revealing. A couple more that jump to mind:
-filthy language is the norm on liberal political forms versus restrained use of profanity on conservative forums
-liberals trash the place when they rally versus conservatives who leave things cleaner than when they came.
Exactly. Documented and easily verifiable.
an interesting experiment would be to:
-park a prius covered in leftist slogans in some conservative area
-park a pickup with republican, pro-life, NRA etc stickers in san francisco
and record the results...