On the second point it's not the airline that it suspicious but the individual on the list. Their actions might be under investigation, and that might include

On the second point it's not the airline that it suspicious but the individual on the list. Their actions might be under investigation, and that might include attempting to buy an airplane ticket. What happens if they never actually tried to buy the ticket, but someone was trying to recreate the list? Wouldn't this type of event occur many many times, and the airline might begin to standout.