We all have our different opinions, but from a practical point of view it is hard for me to dismiss the fact that all the young ppl with Bible verses tattooed with whom I have spoken seem to have received them as conversation-starting witness tools, which manifestly do work in their intended purpose.
If God instructed the young people to get a tattoo, then that is God's business. But for you to push the tattoo tool, as hard as you do, is not okay IMHO. That is overstepping the mark.