If you're a sailor, hard chargin' US Marine, a prisoner or a biker, then you have to have a tattoo. This is a noble art that stretches back hundreds of years. It has marked the skin of many a badass with intricate ink work and left irremovable marks. This used to show that you're hardcore.
"Used to" being the operative phrase here. Today, tattoos are widely accessible to everyone. This has lead to proliferation of tattoo artists who could be better called called "tattoo fartists" for the quality of their work. Naturally, some people employed these hacks to mark them - and wanted their work covered up. Too bad they chose an artist that wasn't any better.