Maybe... They sell A LOT of Mylar balloons here in NY. They even sell them
at the local Pharmacy!
I don't think we're called Yuppies anymore, but the modern-day equivalent
of Yuppies don't like to bring anything home to the kids that doesn't last
a few days... I doubt there will be much Mylar out there today in this half
of the country. It's on the too-cold side of the icing curve out there!
Besides, who has parties anymore?
I saw an RC planes from the air only once that I can recall. It was big
enough, high enough, and close enough to the field that I thought it was in
the pattern.
Can't say I've seen any rockets from the air. I see 'em on TV sometimes,
but they are usually in Florida or Houston or something.
"Jay Honeck" wrote in news:1170680414.893628.128670
@q2g2000cwa.googlegroups.com:
In 500 or so hours, I've seen at least 4 or 5 Mylar Baloons at altitude
(although I don't think at 10,000'). So you are about right. 
Must be a Left Coast thing. I can't say that I've seen more than one
or two party balloons in the 1600 or so hours Mary and I have been
airborne...
I've seen quite a few R/C planes, but only when we flew over their
local airfield.
And we saw a humongous rocket, once. (It was NOTAM'd, and ATC warned
us about them...)
--
Jay Honeck
Iowa City, IA
Pathfinder N56993
www.AlexisParkInn.com
"Your Aviation Destination"