First off I hope the people in that RZR are ok, seems like more than whiplash.
I have no reference of Glamis prior to 2004 but since then Olds is always a s!&t show on weekends, especially big weekends. If you want to see bad and sad things happen in Glamis then spend a lot of time at Olds or at the Drags on a Saturday night. If you just avoided those two spots and went out and enjoyed the dunes you would have a much safer trip and higher likelihood that you won't end up in a mess. I realize that accidents happen all over and I'm not going to judge someone to who wants to go launch off the hill in front of hundreds of people or fly down the drags out of control. But if you are there watching or taking part in the carnage don't be shocked when you witness or get involved in a wreck.
The beauty of Glamis is that there is something for everyone. On the same weekend you could have a newbie that's wound up 40K in debt and running high on adrenaline going up and down olds 100 times a day or you could have a guy on his 30 year old 250R going way south into the dunes carving up buttery virgin bowls and seeing only a few hawks along the way. They both have the same rights and as long as they have their pass : ) ...LOL they can both have a great weekend.
Stay safe out there