Originally Posted by GUWonder

You seem to be trying to make the case that the LEOs can do mostly whatever they want airside, even for domestic flights. Some working as say the FBI's counsel might try to make such an argument as you did, but in private I'd bet they'd admit they're walking on very thin ice likely to break or already broken and would be cursing the idiot LEOs making their workday longer. I'd wager that's not going to hold up in court after court. For example, if the police at the airport demand to read passenger's computer files airside, they'd better be doing so with passenger consent -- which need not be given by the passenger -- because chances are that anything they find would otherwise have trouble being used in a criminal prosecution.