Bumper stickers & nerve

[mdoyle]

I head out for lunch today in the H2 and notice a car in front of me slowing down with no traffic ahead, we don't make the light a block ahead (of course) and I get close enough to see their bumper sticker:

"Tree Hugging Dirt Lover"

I see the driver craning his neck to look at me in his rearview mirror while we sit at the red light, it turns green and he just sits there waiting for a reaction from me.

I took the high road and did nothing while I imagined driving over instead of around

While the hell do people act this way?