[Closed] MX bike met on a Blue route today - going the wrong way!

As above. Was out with a group of teenage lads (for work) taking them round the Blue route at Glentrool today. Just as we reached the highest point of the trail, before i sent them down one at a time, a guy came zooming up the trail the wrong way on his MX bike! Lucky i didn't send them down 5mins earlier...

He even had the cheek to hang around and go up and down various parts of the Blue trail, cutting it up in places. I was gonna flag him down/have a go/swear etc, but didn't wanna do anything in front of the group. Will report to the FC as soon as. Mental!

Ross