On Monday, August 4, 2014 4:35:58 PM UTC-4, John Galloway wrote:
It has often been hypothesised that FLARM might cause
complacency but no study has found evidence of that.

There's evidence that the introduction of bicycle helmets has not reduce injuries. http://www.cyclehelmets.org/1013.html This is probably because helmets have changed behavior. Human nature is common to cycling and soaring.

That said, two careful pilots with Powerflarm are safer than the same two pilots without Powerflarm.