Eric Greenwell wrote:

During my limited contact with the FLARM folks in preparation for a
session at the last SSA convention, I got the impression it wasn't
"liability" directly, but that they didn't know what the liability is
likely to be

I've got no direct contact to the FLARM people, but I know very well how
those liability lawsuits of the USA are percepted here in Europe (be it
correctly or exaggerated). In one word: insane. A claim a million would
be absolutely unthinkable over here, and even 100'000 is usually well
beyond the range. And, most important, end users are supposed to be
intelligent people here, able to read and understand.

So when they write in the manual: FLARM is a help, but it's by no means
reliable, so take it as a help but don't rely on it, then there pretty
safe in Europe. I'm not so sure in the USA.

An excerpt of the FLARM manual (cited from memory): "It is explicitely
forbidden to use FLARM in the USA, in US registered aircraft, when a US
citizen or somebody who lives in the USA is on board, when the departure
or landing point is in the USA or when the aircraft crosses US airspace
during the flight."

Stefan