As others have opined, i'd be looking to sideslip, or quite likely go around unless there's a specific good reason for the S turn.
To the original question, in my opinion there is little danger - provided you don't fly the plane like a hamfisted moron - i.e. don't heave back on the stick, and do use the footrests for their intended purpose
1) A stall in a turn does not mean a spin. It means a stall. Recovered by unloading the wing. Spins require a stall and a
rate of yaw.
2) the aircraft will not stall unless you heave back on the controls.
Stall speed doesn't actually increase with angle of bank, it increases with wing loading. If you hold level, at 60deg you'll be pulling 2G, that's why the stall speed goes up. If you don't try to hold the nose up, banking the aircraft makes no difference, as in englishal's example. Anyone here heard of stall stick position? Seems to be a rarely taught concept..
Originally Posted by Rod 1
S turns are discouraged in Gliding in favour of a 360. Less risk of spinning in.
I find that quite interesting - I was taught (gliding) to always keep the field in sight, and never ever turn away. It takes more height than you think to do a 360, especially in any breeze, you loose height *AND* distance to the field. Would also question that there's less risk of a spin.