[Butch Cassidy Slept Here]

When one is on airport property, and especially when one is aboard an aircraft, the safest procedure is to try to avoid ANY conversation with the cabin or cockpit crew--even if this means forgoing all cabin (meal, etc.) service. Grab some take-out food at an "airside" concession prior to boarding. Limiting one's responses to questions, from flight crew, to "yes" or "no," should be the rule. In the case of travel aboard US registered aircraft, citing your (5th Amendment) "right to remain silent" may be a good response to some questions. The latter action may be applicable since Federal statutes and regulations have accorded de facto police power to flight crews. Also, US courts, going all the way back to US v. Juluis & Ethel Rosenberg, have consistently ruled that one can not be penalized, or adjudged guilty in the case of Rosenberg, for exercising their 5th Amendment rights.