I think using a cell phone as alarm vs. other type of clock is the same a getting to work with a car, on foot, by bus, etc--in either case, different people use different tools to accomplish getting up and to work on time--because different people find the different things work for them.
BTW--I tried to quote the post about not hiring teens who do not have cars because "mommy can't drive me to work"
Heck--if I had needed my mom (or dad) to drive me to work, I would have never been on time--they were always at work themselves when my after school working shifts began. I
walked. Or biked, or took the bus, but mostly I preferred to walk. It was about 2 miles from school, a little less from my house. Is this such a hard concept to imagine
The poster meant that they are "special" in that they have special needs which makes it so that they cannot drive. I do not think that is covered under ADA though (not 100% sure, however).