About ten years ago, I remember an article about a special tattoo ink that was encased in laser-sensitive capsules. When irradiated, the capsules burst and the ink was absorbed virtually completely.  The thing that outraged me was that they were having a hard time selling it, as tattoo &quot;artists&quot; were refusing to have their &quot;creations&quot; be removed at the user&#x27;s behest.  Most artists were even refusing to tell their customers that removable ink was an option.<p>Since criminals don&#x27;t have resumes, tattoos used to be their signaling mechanisms.  As suburban kids began to make that signalling useless, a few years ago I read that criminals had moved on to painful eyelid tattoos. A quick Google search shows that didn&#x27;t slow the posers down very much.  I wonder how criminals signal how badass they are these days?