Changing tickets with another post-security?
Just playing with a thought here.
Let us say that I fly from AAA to CCC via BBB, AAA-BBB-CCC on UA, and someone I know only flies BBB-CCC on DL. The flights from BBB-CCC depart within 30 minutes of each other. Both of us will be able to meet post security in the terminal at BBB (I will be clearing security at AAA, the other person at BBB).
Now the question is, could we hypothetically change tickets with each other so that the other person completes my part of the ticket from BBB-CCC, while I fly on his DL ticket from BBB-CCC?
As far as I know there is no more ID-check at the gate for domestic flights, so it is not very likely that they will catch us doing this, right?