Idiots on motorbikes

A couple of hours ago I was in a queue of traffic on the A701 heading to Penicuik at the lights before Pentland plants. The lights changed and as I was moving off this idiot came speeding past me on a motorbike in the cycle lane another then overtook me on the drivers side and yet another came past on my nearside and cut across the front of my car Then further on at Bilston the traffic came to a stop. A man came out of his van holding the licence plate. I seems that the idiots had managed to knock it off his van. I had heard that this has been happening but this is the first time I have experienced it. I was wishing I had a web cam but unfortunately I have never gotten round to fitting one. Someone is going to get injured soon

Andy