To me, this feels like drawing a red circle around a defect that almost no one would notice otherwise. Whether it helps someone with their trauma or not is irrelevant here, as I’m speaking purely about appearance.
I don’t mind small tattoos. I’m not a fan of them, and I’d prefer none at all, but one or two small ones aren’t a dealbreaker for me. Ironically, the only type of tattoo I actually find kind of attractive is a tramp stamp - which even many tattoo enthusiasts tend to dislike.
If I were to psychoanalyze myself a bit here, I suspect it might have something to do with the fact that I have quite a few moles on my body, which I absolutely hate. So maybe there’s some resentment toward people who have naturally clear, "clean" skin - and then choose to cover it with tattoos.
Other than airports or bag checking to get into events, no. Ironically though I once accidently brought a pocket knife to a big event because they checked bags but not pockets.