I would think the increased hassle of going through airport security might cause people to drive (or take Megabus) rather than fly.
Not really...
The “Bus crowd” started flying when the fares hit rock-bottom in the mid-80’s, and due to the fare increases, has largely gone back to cars and busses.
What TSA has changed is is the “hassle time”.
3-4 hours driving time was the standard for flying over driving in the mid-90’s, while today it is around 6 hrs.