Do airlines check if people passing through the gate actually board the plane?

There seems to be a loophole in the system that ensures that checked bags are accompanied by passengers. Suppose that I check in a bag with a bomb, I go to the gate where my boarding pass gets scanned and I then make my way to the plane. However, in some cases you have to go down the stairs, walk on the tarmac to the plane, or you'll be transported by bus to the plane. In these case, it seems to me I could just sneak out and get back to the airport unnoticed.

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Will an airline tell you if someone boarded?

No. Only way somebody else can check your reservation is if that person knew your name, flight number and the reservation code. Even then, they would not know if you boarded the flight. No airline will give out the passenger list of a given flight.

Why does TSA do random checks at the gate?

Passengers can be selected at random or for suspicious behavior, according to a TSA memo dated last Thursday. The program primarily targets riskier flights, according to the memo, which doesn't specify how flights are singled out.

Who checks the boarding pass?

Most airports and airlines have automatic readers that will verify the validity of the boarding pass at the jetway door or boarding gate. This also automatically updates the airline's database to show the passenger has boarded and the seat is used, and that the checked baggage for that passenger may stay aboard.

Why do airline passengers go through document checking at the airport?

Checking in The check-in process enables passengers to confirm they will be on the respective flight, obtain a boarding pass, possibly select their seat (if hasn't happened already or allowed by airline), and check-in luggage onto a plane, if desired.

I Built an Airport of Suffering Where Nobody Is Safe - SimAirport

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