Here's an example. There is a contingent of weirdos in this country that think wolf-themed garb is the best damn thing since sliced bread. They are a scourge on the fashion world, and an insult to everyone who makes an effort to be at least competently dressed.
Admittedly, I have a few shirts that violate the simplicity rule. A shirt of Freddy Krueger, a promotional Dead Space 2 tee featuring Isaac warding off a horde of Necromorphs, and
this Ghosbusters shirt. But in the end, I think vector art with simple colors is the more sensible choice, and it's not as if there's a shortage of wonderful, streamlined logos in the OW universe to choose from.