[Editor's note: For the next two Fridays, Flavorwire will be counting down our 20 most popular features of 2010. This post, which originally ran on July 22, 2010, comes in at position number 17.] The mad men behind Pilot Extra-Fine ball-pens (aka Barcelona’s Grey agency) have created a great viral marketing featuring LEGOS with drawn on “badass” tattoos. Straight out of your mother’s nightmares, these LEGOS have dedications to Harley Davidson, lots of angry skulls, and in one instance, a rather racy tramp stamp. Click through to view our favorite tatted up bad boys.