Cycle cameras have been slammed as "provocative" when used by cyclists venting online video frustration at dangerous driving.
New Zealand academic Kah Chan has told a conference in Britain that this use of the cameras is "divisive".
Small, high-quality cameras have become more affordable: a cheaper-end Go-Pro video camera can be bought for less than $350. They can be mounted on a cyclist's helmet or bolted to the bike's frame.
Bike-cam footage has been used in legal disputes, including a Christchurch case in which one mountainbiker, Aaron Dalton, pleaded guilty to assaulting another who had filmed the incident and posted it on YouTube.