Flying around in cloud like you guys do on a random track outside of controlled airspace makes the hair on the back of my head stand up.
I've heard it said that in the U.K. there has not been a midair collision in uncontrolled airspace in IMC conditions since WW2. Not sure about down south were it's busier but up in Scotland where I fly IMC in Class G with a basic service (non radar but similar to VFR flight following in the US) the chances of bumping into something man made is zilch. Icing and granite is another story if you don't do your homework or read the charts