Caldwell Tanner has some great ideas for bumper stickers that won't provoke arguments with other drivers....

Maybe this fellow doesn't have a car on which...  ...his fellow doesn't have a car on which to put his bumper stickers , or he just wants to communicate with people walk...  ...ate with people walking behind him. If you had bumper stickers

Here they are, a selection of bumper stickers for people who don't feel that strongly about the...  ...on't feel that strongly about the issues on other bumper stickers . Link -via Metafilter