[bopdude]

A good idea in principle, I know the link says that if your there for a short period then you won't be affected "much" but surely anything over the usual background noise is an invasion of 'personal space' for the innocent. What about toddlers in prams etc etc out with mothers at night, aren't they gonna scream without knowing what they're hearing and not being able to do anything about it.

I think it needs a bit more thought IMHO