One of the larger local teams does something similar (but not quite) on a few of the charity rides around here. They will come out about 8 strong and send one guy off the front. They give him about 5 minutes to get as far away as possible then proceed to chase him down. They don't seem to mind if someone goes with the escapee to help "keep away". I went with one guy last year before I knew what they were doing. After being away for about 15 minutes, I see 3 of the guys' teammates leading the chase to us. After we were caught, I said to one of the chasers, whom I've known for years, "You call that blocking? Thanks for nothing." He just smiled.

They use the rides to make a showing in the community and practice some team tactics. No jitbags.