As a former teacher, I see this as a half baked idea which simply tries to put the onus on teachers, the NHS etc. There are already reasonable checks and balances in place without the threat of litigation. I don't even think that those who thought this up have any idea how it would work. It begs the question also as to why parents or neighbours or anyone else involved with young people should not be under the same umbrella.
I can't see this as coming to fruition because it is basically unworkable.