Interesting question. Reason being, the local kite club down here are allowed, once a month, to let their kites up to 2000ft.
The kind of kites that they have to do this are the big home-made kites like dragons or something like that and the owner can let it go up high for whatever reason.
I think they also have a time limit, say from 1000 to 1400. They also have a designated area for this, last time I looked it was Hove Park where it all happened. It may have changed now, I have not seen any over that way, most of them are up at Stanmer Park these days.
Unfortunately, if you break the 2000' rule, this happens!!!!
Have a look
at this site for an idea what kite flying is all about.
If you ever get the chance to see a kite festival, go and see it. Kites these days are really amazing and if you are into photography they are very photogenic indeed!