I strongly disagree. The point is that you should learn to use BOTH front and rear brakes properly and use them accordingly depending on the situation and how the bike reacts to braking input.

As for just having a front brake, yes it can be used to the point that the rear brake is rendered ineffective but even if you never use the rear it's good to have as a backup in case the front fails for some unforseen reason.

Sweatypants... nice bike, by the way, even though I'd add a rear brake or turn it into a fixie just for piece of mind.