They start as stops for minor offenses, but the reason most people run isn't for minor offenses. There's a subtle difference. The cop sees a person run a stop sign, they go to stop them. Is the person fleeing cause they ran a stop sign? No, the person is fleeing because they have warrants, or drugs in the car, or guns, etc. The cop doesn't know this though, they're not psychic. So, to the public, "Why did you chase him? All he did was run a stop sign!" If it comes to the attention of the bad guys that when they run and drive recklessly, that the police will stop chasing them, this will make bad guys run MORE thus endangering MORE lives in the long run. There are consequences for everything. Very few people run just because of a traffic offense, there's usually a lot more behind them running. Stopping pursuits teaches the bad guys to run more often. BAD MOVE.