Have you ever flipped out over somebodies bumper sticker or t-shirt because it offended you so bad?

No

Yep ... watched little electric car disappear from sight, on the next hill

no never.

However, I was following a punk outside a mall once and right in front of me started slapping bumper stickers on all the cars in the row. When he put it on mine, I calmly ripped ip off before it set, and stuck it in his hair. He squealed a bit but probably didn't get it off without scissors or a set of clippers.

No.

Yeah I always see people's cars being vandalised with this

"honk if you're horny" I wanted to rear end her to prove my point.

Never flipped out...but I went with a few friends to a festival many years ago and there was apparently a new local rap group with an album or song entitled "Shut Up, B*tch !"

So there were a group of young men promoting the album wearing tee shirts with that message. One of my friends wanted to tell them off, but I didn't see that going well, and I suggested just avoiding them.

We were all young and pretty, and eventually some of them began approaching us. When one would attempt to speak, we'd turn wordlessly and walk away. A little old lady standing by laughed and said, "Boys, they're just obeying those shirts !"
One of the guys was so taken by my friend (the one who wanted to curse them all out) that he made a big show of taking the shirt off and tossing it in the garbage in front of us. 😆