"i just bet websites like this aim to make the most offensive product just for the shock value.The more shock value the more their website is spread and the more free advertising they get"
Of course that's the point. The more people complain and post threads like this, the more they get.
Just ignore it. It's a dreadful t-shirt, but nobody has the right not to be offended by anything to the point of telling other people what they can and cannot buy.