In article ,
says...
Mike Isaksen writes:

At 600 feet I doubt any reasonable pilot
would win a claim of "formation flying".

At 600 feet it's really hard to ID an aircraft, at least if you want the tail
number.

1,000' - near impossible - 600' - quite easy; 500' - piece of ****.

Where do you source your info from?

Me? I got reported, 18 or 20 years ago, I had just obtained my PPL and I
was doing a scenic - one I'd done several times before. Part of it
involved heading along some coastline at 500 AGL (gives the pax a great
sense of speed). It wasn't the best weather day for flying, 15kt
easterly. It's a local sea breeze. Along the beach that day were some
very low level clouds (about 2/8 ths cover). So I flew at exactly 600
indicated - rather than my planned 500. Someone (blind obviously)
reported me. Part of the description I heard back was that they could
clearly read my tail sign and hence ID me.

I was fully cleared of any wrong-doing, BTW. ATC confirmed my 600 AMSL
altitude and even commented on how accurate it was maintained along the
ten mile of beach we flew along (or was that sideways

--
Duncan