Forgive the ignorance but I wasn't aware of a particular arguement around the use of motorbikes in races. Riders have had their races wrecked, their seasons wrecked, sometimes even their careers wrecked by jerks on bikes, in cars and even on foot, both in and out of race organisation. If professional racing wants media coverage there is for the moment no better way than a motorbike, coupled to helicopter cover for the more general view. The rule should always be that jerks get banned from driving inside the race, whatever they happen to be driving (which is still no protection for the riders from pedestrians - and even policemen on race control have been responsible for some spectacular and dangerous accidents from time to time). I hope this bike pilot got banned from the convoy straight away (but at the end of the day he didn't even bring the rider down - his lucky day - others have done much worse).