Creases and wrinkles go up, down and sideways. They can easily shrink and stretch fabric. In any way, although I used it first, I don't know how valid MACO t-shirts are for either argument.
http://www.cafepress.co.uk/mf/105917260/personalized-star-trek-maco_tshirt?productId=1856750144
http://www.cafepress.co.uk/mf/105917260/personalized-star-trek-maco_tshirt?productId=1856750144