Not as simple as it sounds
"Speed cameras are utterly irrelevant in my life because I don't drive faster than the speed limit."
I don't either. Well, I try my best not to. But when you don't know the area, and the limits are not properly signed (sign facing wrong way, car mowed it over, not properly lit etc.) then you could unwittingly be caught. At least with a policeman they could use discretion if it's true. It's not often practical 14 days later when the letter can arrive to go revisit a spot where you were holidaying 400 miles away, just to check that the limit is above board before accepting that you were actually to blame.
In some areas (such as 60 + 70 limits) where you should *never* be going any faster on a public road of that type, then make them hidden, break the law, get caught. I don't care about you, you risked my life, think of the children etc. etc. etc.
It is my view that camera trigger points are set too low and close to the speed limit. 33mph in a 30 limit, thats less than walking pace over. It's easy to accidentally stray into this area without being unsafe. Speeding is not so optional, you have to *speed* in the sense that you have to drive at some speed, whether it is 2mph or 90mph, and 2mph is certainly more dangerous on a motorway than 90. Outside factors, such as a strong wind, can influence that speed as you drive along, so unless you are going to constantly look at your speedo to check (defeats the point really) there is a very small chance that you may drift into an unclean licence.
To conclude, and I'd never thought I'd say this, I'd rather have the fuzz.
p.s. Megaphone... because it's as close to a police hair dryer as I can find.
Biting the hand that feeds IT
