I don't think anything prevents people from getting sued. But I don't see why the presence of a device that has the potential to save lives would increase the risk of people being sued. I would think if it changes the risk of lawsuits at all, that it would decrease it, rather than increase it. I've been at two events now where people dropped and could have benefitted by the ready availability of an AED, and I haven't even been to that many events in total. I think this is really something that needs to be seriously looked at by anyone hosting a competition in the future.