I did my training in the Piper Tomahawk, well known for it's (vicious) stall characteristics. We did climbing and descending turns with a stall, stalls with and without flap and stalls at idle and full throttle. Horrid experience to say the least. Did much the same in the PA28 warrior and if I remember, all we did in the Tobago was a few straight and level stalls which were very benign. Correct, planes don't stall by themselves but a low hour pilot, distracted by heavy circuit traffic, lumpy conditions and a bee in the cabin might get caught. One experience I had a few years ago was when a fellow took me for a ride in a Jabiru, speed back to 60 knots turning final, overshot the centre line and rolled to about 60 degrees to regain the centre line. 60° turn is an increase of 40% on the stall speed. Jabiru stalls at 40 knots full flap, so that turn brought the stall up to 56 knots. Not far from 60 in my books. Maybe I'm just a wooz (woose?) but it was not my idea of fun.