absolutely nothing wrong with anything in that video, only one angle and view, bikers heads turns, see's wing mirrors, drivers eye contact, giving them the nod,,,
i percieve a problem when a cager flashes lights or blows horn, that you have frightened or freaked them, or they are frightened for someones safety.
group riding is much safer if all like minded in wanting a blip, your friends being safety markers for you. and nowadays, with bluetooth sets, a lot can say there is a clear bit ahead for a 5 second blast.
sorry if i souns like a complete wanker, but i'v rode sports bikes in groups, and enjoyed a 350mile sunday run verging on irresponsible all day, and been out with a friend without breaking a 'speed limit' cruise, and being frightened to death.
it's the signals, the waves, the boot out, the comradery, that your going out to look out for one another.
that said, when a police camera whitnesses these things on tv shows, they tar us as hooligans. yet i'v been out with traffic branch riders on a 'day off' and they're crazier than any group.
it's a game of luck out there.
weather you get it right or wrong, or weather you get caught.