Depends if the cruise works at those sorts of speeds necessary. My car won't trigger until 40kph, and some of our local school zones are 30kph (which I think is beyond ridiculously low, but meh), and the absolute lowest speed the cruise will enable on my tractor is 57kph, which is clearly based on it's US roots as that translates to 35mph, so it's useless trying to get through 50kph speed/camera zones - I tend to go through any area with a 50kph camera at 40 instead as extra insurance - when your job is on the line vs just losing a few bucks out of your wallet, you tend to care more about these sorts of things.
I did have someone lose their marbles behind me one time, came around me in the typical road rager panic, only to see the flash a few seconds later when they blew past the camera they obviously had no awareness of despite all the signage. These are the sorts of people I have zero sympathy for getting these tickets.