I like the idea, too. One exception where it might not be very effective is in cases where the speeder doesn't consider their time as valuable vs. paying money, e.g. teenagers.

Maybe, but it might be embaressing unless it is on purpuse. You could still withdraw the license etc.

In practice the cops probably need to be able to handle teens "playing" and on purpose getting wait fines some way. It wouldn't be unmanageble.