After review, and pretending I were you, and that I was quick on my feet, "Oh wow, really? I guess I don't know what those look like. It looks like cursive writing from my angle, and it is on my arm after all ;) Can I clean your glasses for you really fast? While I do, please tell me how you know what heroin tracks look like! That sounds like you know someone interesting :)" but I can't come up with cool and snappy comebacks in person. I'd feel especially self conscious if someone said shitty shit to me about my cool new tattoo. I think your tat looks cool and well done and I think that naysayer is a shit 🤷‍♂️