If you think these restrictions are silly (and they are), you should have seen what the maniacs originally proposed (larger in geography and twice as large in time). Only a lot of work by AOPA, CAA and RAF got it down to what it is now.

As for airshow organisers, if anyone in SE England flies and does not already know about this then they really should not be involved in aviating at all.

Probably the same maniacs who decide on airport security in general, which IMO is mostly hysterical nonsense.