I concur with the concurrence of difference of experience and opinion.

Hey makeinu, coaster brakes only work on the rear wheel. Stopping distances are WAY longer unless you're moving at a crawl, and doing any significant maneuver while applying only the rear brake will drastically reduce your level of control. Besides, you may not be pedaling while braking, but you might need to lift a pedal to prevent it from striking the ground -- which is hard to do if you can't backpedal.

It is true that stopping is not always the best course of action. However, being able to stop much quickly increases the number of ways you can respond. Besides, it's usually the best course of action for certain common situations like the right hook or when a car suddenly pulls in front and there's no good swerve option. No offense intended, but I'm going to guess you haven't actually had to a real emergency maneuver before.