Yeah. It seems dangerous when kids are abusing solvents and paint and whatever else they are doing these days. But this is canisters of laughing gas. Its no more dangerous than the stuff the dentist gives you, because its exactly the same thing haha.
Although, hes doing it waaaaaaay wrong and prolly getting brain damage. Its not for me, a friend of mine is getting it sent to my place because hes never home. Its 100% legal...hes getting it for his brothers graduation party.