No one knows you have a headache, stomach flu, migraine, not feeling well but yourself. If my employer requested a note when I call in sick, I just tell them I got diarrhea. Since when having a diarrhea requires a Dr visit? What effing note? They can try to fire me all they want but it ain't going to be because of sick calls.
Normally in a year, I will always have 2 dentist visit, 1 optometrist visit - so 3 free days right there for 30 mins appt time. Then, I'd add those misc "sick" time probably 4-5 more days in a year. Also a good strategy is to say something like "I am not feeling well the day before for whatever reason." Next day you call in sick, no one bat an eye. So about 7 days off extra for me. Ain't nobody got my sick time for chit that's for sure >_>;!
Unethical ? Who the fu3k cares...? Shove your moral high ground up your a55.