Purpose of security checks when LEAVING an airport.

What do you mean, fixed? Just last month I decided to take carry-on only so that I could get into Baltimore, eat, meet my brother coming in an hour later on a different airline, and then get my daughter to pick us both up at once. When I got there I discovered that my careful plans were for naught, since his flight was in a non-connected gate. As it turned out he was 3 hours late so it didn’t matter.

let me get this straight - there is no direct exit outside after customs? The only way to get to the street, transportation, etc. is to go through a secure area again?
If that is true, I understand the policy. What I don’t understand is what nitwit designed the airport, and why they couldn’t build a door and save a ton of money.

They don’t just check for guns and knives, though, do they ? They also make sure you’re not smuggling in drugs, plutonium, dismembered bodies, unpasteurized cheese…

That is correct. They would have to build more than just a door though, since the customs area is nowhere near the parking lot anyway.