It irritates me when people are "looking" to start problems. Such jerks! I wouldn't worry about traveling in the future though. One thing I did when Chase would bark (for a long time) when the bell rang was after a few barks I would shake a metal can filled with coins and say no more bark. When he would stop I would say, "Good boy ..down. Then I would treat him. It took a week or so but he caught on. Now he barks to let me know someone is here but he stops after I tell him it's ok. This may work for you if you practice them before you travel again. BTW, mean people suck.
