The only time, usually, that a glider would be climbing in cloud (other than in wave and very high) would be in cumulus cloud with quite a lot of instability and lots of vertical extent - hence the lift.
I, for one, wouldn't want to go bimbling through turbulent cumulus in my spam can if I could avoid it (and I can't think of a reason why I couldn't).
As someone mentioned earlier, it's all about risk assessment - and enjoying yourself. Oh, and most glider pilots wear parachutes. So I guess the best bet would be to avoid the "risky" bit of the airspace, or wear a parachute, or in my case fly a 22 ton jet with an ejection seat.
Happy flying.
Reichman
