Crossing the Ohio River

I'm in Pittsburgh, PA to visit my parents. Flight up was ok but once again, I got searched at the airport.
I don't have a problem with TSA (although I doubt they really make it more secure) but what's the deal with searching me
or my luggage every single time I fly????
No kidding. I fly a dozen times a year and it happens every time.
I have never had so much as a traffic ticket in my whole life, but I always get treated like
a criminal at the airport.