So what is the OP hoping to achieve by posting this? - other than pretty much ensuring there'll be no further airhead days for the rest of us!
The finger's clearly being pointed at one of the three organisers who gave up their time to bring us this day.
Well I was one of those fortunate enough to attend the day and can say that where the bike on the lift was concerned I recall seeing three, maybe four tossers at one time tightening and adjusting stuff on this bike. The day turned out to be a hands-on tutorial and certainly, I wouldn't have volunteered one of my bikes for that!
So if the OP is pointing his finger at the group in general then so be it. But that's not the way it's coming across. It was a great day and I've not heard a bad word said about it. Until now.
Dave.