I make no bones about the fact that I dislike trampolines and would never let DD on one. DH hates them worse than I do, since his childhood next door neighbor was made a quadriplegic due to a trampoline accident.
My kids who are since grown begged to have when they were just started being sold to the consumer market and their friends had one which they were NOT allowed on. Maryland schools had them for gym class.
In our high school one of the football players fell between spotters and became a quadriplegic. All the safety rules were followed and he still got hurt. The schools got sued and he received over 6millon dollars for his injury and this was when a years salary was $25000. As a result they were removed from the schools.
That is truly sad and tragic for that young man. But I have to wonder, what where the odds that he could have received the same exact injury from playing football? I have seen many more young men air lifted to the hospital due to neck injuries in football then I have due to injuries with a trampoline. And wouldn't the school still be just as liable?
Trampolines, swimming pools, swing sets, jungle gyms, climbing structures, all of these things can be dangerous when kids are using them without the proper supervision. And tragic injuries, sadly, can happen on any one of them or while playing a back yard game of ball. Personally, I refuse to make decisions in my life based on whether some yahoo can sue me over it. As long as the trampoline is used in a safe manner, is either inside a fence or the screen locked (or otherwise reasonably kept away from stray children); it can be a fun activity that is great exercise for kids.