In 1961, I did a school trip where a couple of teachers took us on a walking trip in the Lake District. One day we walked the whole Scafell Horseshoe. Kids need to be challenged as safely as possible because if not how will they learn to assess risk?
I did a cave rescue job fifty years ago this month when flash floods caused a problem similar to the on in Thailand and three cavers got trapped. These guys were expert cavers and used to going through short flooded sumps but were not trained divers. Unfortunately it was the weekend of the Cave Diving Conference in Sheffield and all the local cave divers were away. Our club did the Police diving work (before the Police had heir own facilities and pre-HSE!) so were asked if we could help. One of our members was also an experienced caver and knew the cave well and it had pre-laid ropes. The passages were fairly wide as well. However, I have never been so scared in all my life - following a line by feel in zero viz and it was nowhere near as long a traverse as in Thailand. It was my one and only serious cave dive. Since then I've restricted my cave diving activities to large sea caves like Chandelier Caves in Palau. I'm afraid cave diving holds no attraction for me.
I really take my hat off to these guys and wish them the very best of luck. Hope the monsoon rains hold off until they get them out.