Judge by tatoos. Don't! I'll make this as short as I can.
I met a guy thru cars, and we became closer than brothers over the years. Yeah he had tatoos, mostly home done ones from time in prison. He had been a genuine biker, not a wannabe, but hard core biker. Bad bike accident, saved old lady by throwing her off bike and went off mountain with bike. No more riding because of injuries, not by choice. Got into cars, and became quite a Ford guru. Knew amazing amounts about bangers, flat motors and overheads and related cars. Collected bunchs of parts for all, but mostly flathead stuff. If he had a part that he didn't need right now, he would trade, or give it to you and say you owe me something later, and I have even seen him give things to people. He built many cars for himself, his old lady (eventually became his wife) and others, mostly by trade for parts. If a local small town police department needed a DARE car, he would find cars for them to check out and buy, then he did all the mechanical, body, paint, and installed whatever lites etc they provided. No charge for labor or any parts he had. If there was a benefit for an injured person, or for kids, he was the first one there, and donated a lot of stuff to be auctioned off as well as his time to do anything that was asked. I could go on, but you get the picture.
What would have happened if I had been one to judge him by tatoos? I say "had" a friend and "became closer than brothers" rather than "are closer than brothers" because he passed away a couple of years ago, but I still think of him as often as I do anyone in my blood family that has passed away.
I do judge people, but by their actions, not their tatoos or anything else about their appearance. That's my phylosophy on things.