I remember one time, a guy committed suicide in the army. They found a poster with marilyn manson in his locker and all around the news was something like: "army men killed himself in a satanic ritual". Dunno what satanic ritual involves putting an AK47 in your mouth to shoot yourself
However, this shits happen when media wants a story...
But that's with rock music, i dont think media has the same reaction to porn, for a good reason: Lots of Metal songs are violent and have messages like "bring your daughter to the slaughter" for example, song from Iron Maiden

It's a not so commercial genre today.
But i for one dont know anyone who does not have at least one porn videotape in his house, not to mention GB's of porn in pc

So i dont think that giving a mypornsite.com shirt would be a problem.