Definitely worth doing. When dealing with Kitesurfers kit... if you get it wrong, it goes very very wrong.
I've been the only Brit on the rescue team at the KPWT World Tour in France for the last two years. It's an awesome sport, but the conditions that they compete in are very difficult. They want a minimum of 14 knots of wind to launch this year, and will carry on without a top-limit :-S We were out in Force 8-9 last year, that was fun (not). Thank **** I was only crewing!
The easy thing about that job, is that as they are all sponsored, they don't care about their kit. Cut the lines, stab the kite, do whatever we need to do.
Last year we had... one dislocated shoulder, one torn knee (she's not long recovered), one hyperextended elbow, one concussion.... and that was just on the rescue team!!! We had a fractured tibia from the competitors.
This year we had... suspected spinal, many concussions, broken ankle... and that was just from the spectators! Nothing from the competitors as there was no wind, so no competition!
The RNLI leaflet about packing down a kite is quite good... although how easy that is to do in the water, I'm not sure.
I'd highly recommend it, kitesurfing is a sport like little else on the water... it's about time it got a section in the Safety Boat course - considering it's boom in popularity.