They won't arrest you the next chance they get (say, when your plate shows up on a scanner)?

I'd propose that avoiding jail indefinitely will eventually lead to violence in any halfway-organized jurisdiction. And if you start shooting, eventually the government will shoot back.

All over a driving misdemeanor. We just assume that reasonable people won't let these things escalate that far, but yes: Every law written is ultimately enforced by a man (or woman) with a gun.