Here is a collection of bad gaming tattoos. Although I will say that I don't think 19, 16, 9 and 8 are so bad.
I am a fan of many products by companies, but I would never have a tattoo of a company logo on my body like the people in photos 15, 14 and 1. Branding yourself with a company logo as if you where a product. The guy who has branded himself with the Nintendo logo even included the little Registered Trademark (R) on his tattoo. I don't know if this legally makes him the property of Nintendo like it does with cattle farming, but I would be eagerly following the caught case if one should arise from this.