I know I'm about to jinx myself but here goes.
Radar detectors are illegal in Ontario so I have no experience with them, instead, we have to rely on wits and cunning. I was told by another rider (police officer) that radar/speed traps are usually only setup within 10-15km (6 - 10 miles) of a town that has its own cop shop. The reason being the officers are paid to patrol the city limits. They tend to alternate on on the entrances to the town and thus, the radar 'boundry'. Now, this is only general rule, but over the years I've noticed that when I've spotted a radar trap, its nearly EXCLUSIVELY within those guidelines.
So when I'm travelling, I turn the wick down as I approach and depart towns. Once clear of the danger zone, I turn the wick back up. Nothing insane (hehehe), but up to the upper edge of what could be considered the upper threshold.
Now in Ontario, we have both municipal police, and Provincial police. They, the provincial police, use radar and timing by plane. Even their tatics can be avoided though. They'll usually setup on long straight aways, or, immediately after passing lanes. The planes can usually be spotted well ahead of time and your good to go if the weather is overcast.
Of course, all this is moot when your in the middle of nowhere surrounded by nothing but trees and your had. But those are the really rare occurances.
Serious speeding in Ontario is only done by the terminally stupid nowadays. 50km (35 mph) over = immediate license suspension, impounded vehicle and a $10,000 dollar fine. They've given new meaning too "Speed cost money, how fast do you want to go".
Oh, and god help you if they so much as smell a radar detector. They'll just confiscate it and execute you on the side of the road.