Does anyone here know how to design magnets?

Here is an idea I have been toying with for some time: I would like to have a bunch of bumper-sticker size magents made up that say "This person is a f*cktard", for when I see a parked car that has a number of anti-liberal stickers. Not necessarily Bush/Cheney stickers, but the Rush Limbaugh rhetoric stickers, like the ones discussed here, which are the essence of mean-spiritedness. I'd really love to have a stack of magnets like that handy for when I see a car dressed up with a bunch of these foaming-at-the-mouth stickers, and they should in particular be magnets so that no one can claim that any damage is done to their car. think about how often people actually LOOK at the back of their car; in some cases, it could be there for months!
Just a nice idea of being able to comment back to someone...

You could go to an art supply store and ask them. They should have some little plastic sleeves that you could use. Sort of like the do-it-yourself pins.

might be a good place to start

Cheap?

Make your own inkjet designs and print them. :D

They're easy to remove and resist fading and water. On my Epson Stylys Photo 2200, they lasted 9 months. By then the paper yellowed but the ink did NOT fade or smear. (of course, it's expensive pigment ink that's designed to last a while and be water resistant... standard dye inks would probably last a couple months tops... hard to tell.)

http://www.avery.com/us/Main?action=product.Details&catalogcode=WEB01&node=10210841&productcode=3270

Print your own!

That might make it workable.