Having trashed mine this week when i took flying lessons, I see the need, but as to be made compulsory, I think not.
Commonsense tells as when to wear one or not.
What does annoy me a tad, is when you see families out cycling, and mum or dad have made the Kids wear helmets, but then the parents dont, which is firstly not setting a good example, but who going to look after the kids if mum or dad or both have accidents which which end up with them brain damaged or dead, which has happened in the past.. end of Rant