On Friday, 20 March 2015 16:28:29 UTC+1, Tango Whisky wrote:
They even didn't provide a opt-out (other than what I did, or switching to stealth and deal with reduced warning modes).

Even the "privacy options" OGN did provide were only respected on the surface. OGN distributed the complete data of everything they received in the full network to anyone who connected to their data stream with an alternate client including full precision data of FLARMs set to stealth mode.

Many pilots would have stopped using the FLARM under these circumstances. I consider the reaction of FLARM Technology quite accommodating given that the primary function of FLARMs (collision prevention) would be significantly impaired if the usage percentage drops.