Good thread.............
I have used them on some very fast TRS runs in the past. They were awesome but potentially dangerous.
There was the issue of the public not knowing what they hell was going on as they tended to be used for overtaking moves i.e blind bends - where an unbeknowing car would get passed and wonder why the passing car was being driven so dangerously......
So other than for ensuring that people are catching up in a group they dont serve too much of a purpose to be honest.
When we were out we could pick up bikers doing the same thing as us............so when you sayy "go, go, go" some poor biker gets nailed
I think the Feds would also pick up on this
Stick with small groups, bags round sign posts and the like in my opinion
Cheers
Cal