I happen to see this and find it an interesting poll.... I never have a bumper sticker, not only because of the removal trouble but also because I hate to give people a chance too often ot get a wrong opinion of me because they might take a sticker with ironical intention as serious or take offence where none was meant.... and baby or animal on board stickers are sensless in my case

my laptop is covered with all manner of stickers.. bumpers included

one bumpersticker on my back window (support your local dirt tracker)

I don't have a car... In fact, I don't even know how to drive!!

I don't have a car, but I can think of a few I need. And I shall list them, not really having anything better to do!

First, one that reads, "πMP: Nerd Playa'!" (that's supposed to be a pi symbol there)
Second, "My God can beat up your God!"
Third, "Red Sucks" (a Red VS Blue joke)
And probably a few more that I'm going to make.

Alright, so mine was obviously "I have in the past until some dude hit and totaled my car".

I had a DLI Fort Ord parking sticker on the left part of the rear windshield, two small decals on the other side and one large "Support Your Right to Arm Bears" on the left bumper. So far, we haven't put any on the new car. I still have to track down the ones we had on the i-net.