We've actually discussed this from a legal standpoint on this board already. The TSA's signs always state that one's property is subject to search at ANY time.
As I understand the law, one consents to any and all TSA searches just by passing through the WTMD once. Like it or not, that's how it's interpreted.
I am stunned that the TSA continues to spend its money screening passengers who are done flying. I cannot fathom WHY they would bother with the ridiculous time and expense of screening arriving international passengers who are only going to ground transportation. This is the case in Cincinnati, Atlanta, and other airports. It's so wasteful. And I'm sure that there is a reasonable way to redesign the arrivals area with a bus to landside.
There is nothing worse than arriving after an 8 or 9 hour flight, only to wait in line for 25 minutes for unnecessary security screening.
The same is true of "reverse" screening. It's a waste of time and personnel. I fail to see any logic behind it.