TLDR Version: At the moment on Waze you can only report either speed cameras, red light cameras or fake cameras, having a 'yellow box junction' camera would be a logical and great addition imho.

Non TLDR Version: Yellow box junction cameras drive me nuts (for those not UK based these are cameras that make sure yellow box junctions - ie boxes marked on the road to stop drivers stopping at the entrance to a side junction and blocking it), mainly because not all yellow boxes are enforced with cameras (so drivers from all angles enter it and the only way to cross is to barge your way through) and usually yellow box junctions are put in the most ridiculous places seemingly by local officials who don't drive (I just got a penalty charge notice for one that is at the crest of a hill, I couldn't see it and the truck in front blocked my view as to whether I could cross it).

Thanks for reading, please vote! :)