I think those who think it's a horrible idea should look at what actually disqualifies one. The majority of these issues are going to come up in a major way that would prevent you from flying. Not much you can do about hiding hide blood pressure or heart disease, for instance.

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What medical conditions does the FAA consider disqualifying?

The following conditions are listed in the regulations as disqualifying medical conditions; however, in many cases when the condition is adequately controlled, the FAA will issue medical certification contingent on periodic reports.

Angina pectoris

Bipolar disease

Cardiac valve replacement

Coronary heart disease that has been treated or, if untreated, that has been symptomatic or clinically significant

Diabetes mellitus requiring hypoglycemic medications

Disturbance of consciousness without satisfactory explanation of cause

Epilepsy

Heart replacement

Myocardial infarction

Permanent cardiac pacemaker

Personality disorder that is severe enough to have repeatedly manifested itself by overt acts

Psychosis

Substance abuse

Substance dependence

Transient loss of control of nervous system function(s) without satisfactory explanation of cause.