A quote from this BBC article:
""Everybody's got tattoos, everybody's got stretched ears [but] you never see anybody with the whites of their eyes tattooed," says prisoner David Boltjes, explaining why he took a huge risk to inject himself.
Luna Cobra says that what started as an experiment between friends, and fans of Dune, has run out of control. He's also heard that it's fashionable among Brazilian teenagers and in some Russian sub-cultures - and worries that people could be being harmed.
"It's shocking. We had no idea anyone else would do it. And now everyone's obsessed with it," he says.
"We often felt like we released a beast into the world and now all these people will be damaged," he says referring to the many ways the tattooing process can go wrong - from using the wrong ink and needle to injecting too much pigment or going too deep.
"It's a shame because I think it's something really beautiful, but it's taken an odd course.' "
Check it out here: