If I had a pound for everytime I saw someone brake to a few mph below the speed limit when they're going through a speed camera I'd be a rich man
Given how fast I'm often going - Yes, I brake to a few mph below the limit.
Kinda what you do in order to avoid getting flashed, really.
Now, those who brake whenever the road even slightly deviates from dead-straight... those are annoying... along with the ones who come up behind a *slightly* slower vehicle and keep touching the brake every 10-15 seconds!
I'm talking about people driving around 40 in a 60 limit here not 5 mph below the limit.
Again, have done this myself, more on countryside twisties where there are frequently nasty hazards just round the bend, or on tight corners where I know people run wide (have had to mount the kerb more than once), but especially at night.
Same for in town, given how many iPhone Ninjas think it's hilarious to step out in front of your vehicle, dressed all in black with hood up and earphones in, from behind a parked car or something...
Again, could be many reasons - Perhaps they didn't spot the speed change, or are limping home on a space saver wheel .
Calm down.... relax... put some Classic FM on...
Or if you prefer, just blaze off at high speed, bibbing your horn as you blast past, before slipping off the road, smacking into a tree and firing yourself through the windscreen just like some bloke did a couple of weeks ago outside our house.