To be diagnosed with skin cancer one must consume one ounce of ink, which is equivalent to 28.x grams of ink.
To by believe, there is only 17 grams of ink in one pen. Plus, theoretically, one must consume 28 grams, which means taking it directly, orally or some medical extent. When placed on your skin, ink is only absorbed through the pores, and only some of the ink is absorbed.
I've gone through 2 pens, onto my third, try and stop me.