Is bungee jumping unhealthy lifestyle? And how do the insurers find out my hobbies? And for the ladies, is jabbering about absolutely nothing on your cell phone while driving... is this an unhealthy life style?
Good one. I know that some professions and hobbies (pilot's license mentioned above, also scuba-diving for example) are specifically asked about. It seems to me that at least a couple of years ago they were able to ask if you were an "antique dealer" or "interior decorator" for example as code for "are you a homo full of AIDS?".
In a more ideal world, the insurance company would have a database of all these kinds of things, including requesting a statement that you either don't have a cell phone or you have one and here's the bill for the last three months. You could either voluntarily give that information to that insurance company or harrumph about intrusiveness and pick another one.
You could put all of those in a questionnaire.