Yes. The comics actually explain the tattoos. They were from ancient traditions where the Romulans would adorn themselves with a mark that would fade to symbolise the passing of grief. They made sure theirs would not fade, though, because Romulus was destroyed, and all that remained was vengeance.
As far as Klingons with piercings. I don't see the issue. It was one Klingon. It doesn't mean they all look exactly like him. Let's not turn this into another case of bowl cuts ala Spock and the Vulcans.
As far as The Borg? Eh... No, thanks. If they're gonna use something from Trek i'd prefer they stick to pulling things out of TOS to play with. Things we haven't seen a lot of since TOS.