Thomas Borchert wrote:
Greg,

many places in the world
(like almost all of Europe)


Oh? I fly here. Just yesterday right over Hamburg, the second biggest
city in Germany, pop. 1.6 million. Where do you get your data???


Well, for starters it's published, and publically available. Secondly,
I've flown a lot around Paris and France in general. I admit I haven't
flown in Germany, but I do go to Munich several time a year and the
skies over that city are hardly buzzing with light aircraft (like zero)
so perhaps it's more restrictive than you make it sound?

GF