... in terms of due care and attention when splitting/filtering. It's just my observation, and it's a huge generalisation that won't apply in all individual cases, blah blah. But seriously, I regularly see cyclists splitting at 40-50 km downhill between rows of stationary or moving cars, or up the left, in situations where they wouldn't have a hope in hell of stopping if someone suddenly opened a door or decided to change lanes. Scooters do some of the same as well as duck and weave on the absolute assumption that no-one will do anything unexpected. The vast majority of motorcyclists I see, even if they split in places where I personally wouldn't, are riding in a far safer way in terms of space and time for error, going at an appropriate speed, etc.