From the way I see it, the shirt was nothing to get bent out of shape about. Yes, the innuendos are all there. There's many of them stacked up, but most people just get off with a glare. He did go by their rules and turn out his shirt, but seriously...
Now I have a shirt that is
delightfully offensive. Every time I see it in my closet, I generally pass it over. The only time I wear it is when I'm sitting around the house, hanging out with my friends at their place, or am in certain social situations. Rarely do I wear it out in public (I have done so twice to my recollection, maybe three times - out to a bar, to a horror writing class, and maybe to a concert). There's a certain stigma attached to shirts that blatantly yell obscenities.
Now to me they're nothing but words, but I know plenty who'd get offended. So I choose not to wear it. This guy, on the other hand, had no obscenities. It was word play.
Now is that really worth getting singled out?