If you don't want to drink energy drinks then don't do it. Don't tell others what to do.
Toddlers shouldn't be allowed to play with electric fans. I'm OK with mommies, and even strangers, telling them not to and physically preventing it.
More, I'd argue we should tell people the consequences and make sure they understand them before they do it, which may be tantamount to telling them they shouldn't. So maybe we should tell people not to but not punish them if they do.