A lot of things people ingest are toxic, the trick I feel is making that well known and public knowledge, not necessarily illegal. For example, the surgeon generals warning on the pack of a cigarette, or the chemical warnings on a bottle of bleach, I feel are a better way to approach the problem.

Part of my attitude comes from growing up in New Hampshire. For example, if you are a consenting adult, and you are only harming yourself, then that is your prerogative. Why you don't need to wear a seatbelt if you are over 18, or a motorcycle helmet. The risk you are taking on is not against other people, like drunk driving, but mostly only to your own health.

Now an effective part of that comes down to knowledge, but certain ideas can be ingrained in a society over time. Like put on a seatbelt or be thrown through the windshield like a crash test dummy.