The problem with any laws for a good purpose is that, even if you can get everyone to agree on the general statement of a good purpose, there are disagreements on what actually counts as achieving the goal from both a moral and a scientific level.
For example, providing information on how to do something harmful X more safely might increase the risk of people doing X. On the moral side, someone might argue that even 1 more person doing X is worse than the reduction in harm of the others doing X. On the scientific side, there is likely not direct evidence to the exact numbers (ethical concerns with such research and all that), so you'll have some people disagreeing on how much the harm is increased or reduced and different numbers can both be reasonable but lead to different conclusions given the lack of direct research.
This all becomes supercharged when it comes to children, and you'll find people not even be consistent in their modes of thinking on different topics (or arguably they are consistent, but basing it off of unsaid unshared assumptions and models that they might not even be consciously aware of, but this then gets into a bunch of linguistic and logic semantics).
For example, providing information on how to do something harmful X more safely might increase the risk of people doing X. On the moral side, someone might argue that even 1 more person doing X is worse than the reduction in harm of the others doing X. On the scientific side, there is likely not direct evidence to the exact numbers (ethical concerns with such research and all that), so you'll have some people disagreeing on how much the harm is increased or reduced and different numbers can both be reasonable but lead to different conclusions given the lack of direct research.
This all becomes supercharged when it comes to children, and you'll find people not even be consistent in their modes of thinking on different topics (or arguably they are consistent, but basing it off of unsaid unshared assumptions and models that they might not even be consciously aware of, but this then gets into a bunch of linguistic and logic semantics).