I had to stop some commuter last week and fix her front quick release for her. Nothing that scares the crap out of me more than seeing someone with the lever in the wrong position, poised for a nice little whoopsie. I've seen the aftermath of what happens when a front wheel drops off and it is not. at. all. pretty.
This should make the essential point:
If that still wasn't clear, read this.
This is Bike-to-Work Week (and if you can only make one, Friday is Bike-to-Work Day) in the US. Let's do it, folks!