put some bubble solution in and blow bubbles at them

My friend had an old Impala that he put oil in the washer bottle and stuck the tube into the carb. When they tailgated he hit the wash and smoked them out. I know it was hard on the engine, but it was fun when you're 16.

Better yet...............

Fill it with baby oil

When I was younger I had a motorcycle and had a piece of red foam the shape of a brick in my riding jacket pocket. Take it out and toss it into the air when a tailgater was on my butt. Worked like a charm every time!

Two words: Brake fluid. Then their paint will peel off in sheets later.

I really wouldn't recommend this, but it sounded good.

While I understand the intent, and have done similar with previous vehicle (SUVs with a rear sprayer are nice for this), please keep in mind all liabilty issues. Should any damage be caused by this, they're right behind you with a nice clear view of your plate.

This wouldn't be as easy to get out of as the MN coyurts decided speeding and/or stop light tickets were. "It wasn't me driving" wont get you out of any tickets or litigation based on an intentional mod.

Your best bet would be something that does not cause permanent damage. Water, soap, stuff like that, would be as far as I would go. A light mist and a dusty windshield should be enough to get them to back off.

A good place for the sprayer might be in or under the rear spoiler. Painted to match the body, and it would be virtually invisible....

Waaaay back when I was 16, I had rigged a choke cable to my rear plate so I could drop it out of sight.