Prejudging people for something that MAY happen isn't my modus operandi. A guy holding a cocktail isn't necessarily going to drive drunk. I'm not their daddy. I can encourage them not to drink and drive, but ultimately, I don't answer for anyone but myself. The immediate corollary is that no one else answers for me, either.
Saying that others should live by my priorities seems short sighted. If something bad happens, or appears to be happening, then certainly, I would act in good faith. But as a general rule, if they aren't harming people, I feel I'm out of line interceding based on MY values.
They aren't me. I shouldn't presume they think, act, or feel the same as me. Presuming I know better is awfully proud, given my history.
"Always Believe!" -The Ultimate Warrior