The closer to the edge you get the smaller the margins, and less likelihood for recovery if the edge is crossed.
Yes but that's the whole point, isn't it? That's why these guys enjoy it, along with racing car drivers, bike racers, free divers, all those guys. They just happen to do it in an aircraft. These guys LIVE to take risks.
To me it just looks like an extreme form of ag flying.
Let them get on with it, sure somebody will die eventually but taking the risk is their choice. I'd rather not be forcibly wrapped in cotton wool and protected by the state, thank you very much!