Why wouldn't they be? The best time to make a law against a form of activity is when the activity is not being done and is (still) viewed as bad. Waiting until it is a problem is cause for a much harder push that is not always successful.

Noone has to strict warn, and many leave it off for ad-hoc code to test an idea or two. I say it is a good idea to recommend it, just explain why, and let the users make the informed choice when they become of age.