Still batting a zero, Sylvius.
In order for the Dalish elf to not have tattoos, they'd need to develop a full character (dialogue choices, motive, NPC reactions, explanations of how it fits the lore, etc. All of which the game, not you, provides) for no apparent gain.
And I've just said that they shouldn't do that. If a player decides to ruin his game, let him. They shouldn't waste a bunch of resources supporting the choice of some lone crackpot who does something crazy.
I know I do some odd things in these games, and I wouldn't want to waste developer resources to support something only I do.
But I also object to developer resources being spent specifically to stop me.
A player who jumps into the game and makes character design choices he doesn't understand has only himself to blame if it ruins his gamrplay experience. We shouldn't pander to that sort of reckless inattention to detail.
And I hope you noticed the inherent contradiction in your words. Enforcing the Dalish rules on the Dalish option is what makes them Dalish, as opposed to City Elves. Dwarves can't do magic, Dalish get tats, Mages wield staves.
Why do we care about enforcing that in someone else's game?
And mages don't all wield staves, I hope. I much preferred the DAO design where staves (or weapons at all) were optional.