It's irrelevant. You're telling people what they can and cannot do based on when they were born.
It'd be one thing if no one could smoke. But youre not saying that. You're strictly saying because you were born after x date that you can never smoke.
That's entirely messed up and my point being it's terribly against personal freedom.
And you basically proved my point- people will make allowances for other vices but not this.
Maybe use tags for that but I've never personally messed with it.