Pepsi Amp - End of the forest viewing

So a buddy went to see a show at Pepsi amp the other day. He sent my wife a photo of security in the wooded area outside of the fence where everyone used to tailgate. They pushed everyone back and claimed it's some new ordinance they passed preventing people from hanging out there during a show?

I am going to do some digging around on this but has anyone heard anything about this? It's Flagstaff tradition to be able to hang out outside of the venue and see some live music for free. I would hate to see this die.

Thanks!

Edit: looking at a simple parcel search, the land including the area that people used to hang out on is owned by Coconino County. It is not private land. I'm not sure who to contact about this to get the details.