A modest, even restrained standard multi-sticker display* **, Newmarket, New Hampshire. These aren't hard and fast rules, but if there are more than one or two bumper stickers, they probably aren't Republican; five or more, often gay or Wiccan; ten plus, gay Wiccan or Harry Potter-loving astronomers--or, as erik.swenson points out, Deadheads (see comment, below); hand painted messages tend to be small-L libertarians--or Patriots fans. Then there is this. _________________ * No "friends don't let friends vote" or suggestions that since they didn't vote for somebody, that somebody really isn't legally and constitutionally President. ** Particularly for a Subaru.