Perhaps I'm just a sicko, but I thought they were rather original and some were amsuing. I don't wear printed t-shirts myself (I don't like to voice my opinions on my bumper or my chest--nothing wrong with it--in fact, I like to see a funny bumpersticker--it's just not "me"), but DH loves them. His aren't political, just weird. Ones I gave him:
"My imaginary friend says you have serious mental problems" (my fave)
"Evil squirrels are out to get my nuts."
"How may I annoy you today?"
"Silence is golden; duct tape is silver" (with a smiley face, with a strip of duct tape over the mouth)
"It's only a flesh wound" (the Black Knight from Monty Python & the Holy Grail)
"Stop feeding my silent rage."
And various Marine Corps t-shirts (he's a former Marine, Desert Storm Vet).
Ok, I do have one, a gift from BIL, which I've never worn:
"Of course, I'm listening fully to EVERYTHING you're sayi...oooohhh, look, a KITTY!!!!"
I admit, if you wear an inflamatory t-shirt, you can't complain if you invite trouble. I just don't take them too seriously. Everyone's entitled to their opinions.