Amanda Dunleavy from Bolton, who was on the flight, said the pair aroused suspicion because of the way they acted when they were queuing.
She said: "They queued up for a good 40 or 50 minutes and then wandered off. They kept coming back, standing very, very close to people, intimidating them.
"The minute they got on [the plane] they started going under the seats and messing.
"When people began to take notice - and one young girl was really upset, crying - they just sat there laughing."
BBC.
If and, I stress IF, the above is true then you can sort of understand why people were getting a bit nervous. At the moment people are suspicious of "asian" looking men and drawing attention to yourself is just a bit daft. But it remains to be seen whether there really is any truth in the above statement.