having read my prev post again, the reply was strong, which is out of character for me, and I apologise to subculture for that. I am not saying insurance is mandatory, but having a friend who was nearly blinded this year by an accident with 250 size heli, which isn't that big, it was a bit close to home, If the accident was by a 3rd party, and not by himself, then liability cover would have provided financial compensation for injury claim, and so on. I have also flown in a regular indoor flying meet, with "foamie" planes, and micro helis. Generally, flying clubs ( not just some mates getting together in a hall or on a field) provide the first 3 visits covered by the club insurance, then you have to be a member of something like BMFA (British Model Flying Association). This governing body has strict guidelines to be adhered to, which come back to the previous points of invalidating CE approval by dabbling with your TX etc. If you "guest" fly at other events, BMFA insurance cover is mandatory to provide 3rd party liability cover to others, their belongings, and the venue you are flying in. I see this as showing your other modellers respect, we think nothing of spending £30 on batteries, or something else, but squirm about spending less for 12 months insurance cover.
I have insurance on all my boats for the same reasons, its my choice, not mandatory, but if an accident happens and someone sues me, I have cover, oh and we where not talking about sailboats, but aero models.