172 changed the landscape for riders in a bad bad way. A lot of people won't stop because they don't want to chance a 172 charge. That is the root of it to most who run imo. And they'll run for relatively minor stuff because 172 can and has been used on pretty minor stuff.
Riders know what can constitute a 172 is so broad and discretionary that for many of them, even though they may not have been doing much of anything wrong, it makes a lot of sense to run because there is a reasonable chance the officer is thinking 172. I remember weaving and standing on the pegs even being considered possible for a 172 charge. I get a bad hip cramp on one side from time to time riding and I immediately stand up to relieve the pain and stretch it out. What happens if an officer sees this and lights up? Am I getting a 172 charge for standing on my pegs on a sport bike because of a hip cramp? What should I do? Plus, there is the Bunda case. Squeezing for a right turn was found to be 172 worthy.
http://www.gtamotorcycle.com/vbforu...ate-of-the-law-in-Ontario-a-look-at-R-v-Bunda. Worthy of impoundment, $2k fine minimum, and even more so heart-attack (facility) insurance rates for every vehicle and motorcycle he has for more than a few years.
Another related consideration is that the punishment for running and getting caught is frankly similar to a 172 charge. And a plate means nothing if the rider isn't a doofus. Even the youtube 299 km/hr guy in BC traffic got off.
Another consideration ae previous bad experiences with a police officer or officers. I know some good cops, and I've dealt with a few bad cops. Want to roll the dice on what kind of officer has just lit you up? With the 172 legislation out there? Out riding one day years ago before 172 I got a FI problem that resulted in erratic throttle response. Turned around and on my way home (who wants to drive a wonky bike with a flashing red warning light on the dash), pointed out the flashing red warning light and explained the issue to the officer. He said he'd give me a ticket but if I show up to court with service proof of the problem and getting it fixed he would kill the ticket. Got it fixed (new bike under warranty), it was a TPS issue, went to court and showed the officer the service receipt which had a detailed description and explanation. He completely forgot about the earlier conversation and refused to honor his offer. Unfortunately, in many people's experience, many police officer's cannot be trusted.
Then there is the shady side of using 172 that so many riders read about or observe. There have been some real stretches for charges. Then the fraudulent 172 charges. Then the speed traps like at the end of 410 where the speed limit decreases that is nothing more than a revenue tool with zero safety in mind and they've 172'd vehicles there as well.
Many people like to wheelie. I really enjoy wheelie-ing. That is explicit 172 charge territory. What happens if a rider wheelie-ing sees a cop car or SUV? Very often I'd guess.... hammer down. For a wheelie.
My thought processes about what I'd do with a police interaction on my sportbike before 172 is now very different with 172 out there. Most riders are just people. They'll take their lumps with typical HTA legislation (speeding charges, undue care and attention, etc). But with draconian 172 legislation out there, for many all bets are off.