They're no good against a good lawyer really....and completely useless against next of kin. If somebody at an event was killed, their family could sue DGTrials regardless of agreements betweent DGTrials and the deceased. This is where the insurance comes in I suppose. Kind of like the whole "24 hour library checkout of software", not much more than a false sense of security really. I guess there is some point, keep them from getting sued by poor people who can't afford a good lawyer maybe?