Completely agree with ST, I find it a little unnerving that I could be flying the correct quadrantal level under IFR in IMC minding my own business and get hit by some gliding bod spiralling up in the cloud in a completely indiscriminate fashion simply because he feels like it! Is it me, or is there perhaps a need for a bit more rigour when it comes to the combination of gliding and IMC? Surely there should be an obligation to announce on the most appropriate GA freq. (which may or may not be obvious I grant) that he is a non powered aircraft 'overhead x, intending to spiral climb into IMC etc....' at least we could all divert and get half a chance. Or maybe gliders should stay in VMC unless they squawk and talk to ATC etc?