In typical form for someone who's Piled Higher & Deeper, I'm probably overthinking this, but now you can do it with me.

A colleague of mine, who could be mistaken for being younger than he is, says he filled out his FF profile as "Dr. Colleague," reflecting his Ph.D. He didn't think anything of it at the time, but he says he believes he gets more respectful treatment for it.

I still look young enough, and travel casually dressed enough, that I sometimes get reactions and treatment aren't quite consistent with my airline or professional status (e.g., last Wednesday, an offer of a little help finding my seat when I turn left upon boarding a 757). In my FF profiles, I am "Mr. PVDProf." Should I switch to "Dr."? (Realizing that won't help snap judgments based on my appearance, but it might help in other areas....)

I have consciously remained "Mr." because I don't want to be asked to help in a medical emergency; I don't even want people wasting time asking me. (I am accepting that it's very unlikely that my specialized skills will be needed during an in-flight emergency: "Captain, there's a shortage of pillows on board and we need to design a revenue-maximizing auction to allocate them efficiently AND stave off bankruptcy. I'll see if there's an economist on board!")

Which way to you break on the "Dr." issue, and why?