yes, obviously when a boat has come (rescue guaranteed) it is safe to deflate a kite as the kite wont be going anywhere except for inside the boat.
I also agree with you that if the kite is twisted in lines and has a mind of its own its probably safer to let the air out and 'kill the kite".
But when the lines are not tangled and the kite is just lying there, its dumb to deflate and try roll it up, just because you dont know how to pick it up, i think. ( im just refereing to my situation here)
I guess like anything else, it depends.. but yea. as for my kite, deflating it was a bad move.
thanks for your condolences, but new kite is flying over from syd as we speak. too bad its pink