I take an MTA bus, the subway and a MetroNorth train on the way to work each morning (reverse the order for the trip home) ... and each of those modes of transport is (in principle) subject to search. So I figure it'll happen sooner rather than later.

As a CCMACLU (card-carrying member of the ACLU) and a lawyer, I feel it's my duty to protest searches made without reasonable suspicion. But I also have no objection to showing the innards of my briefcase or handbag to a security guard when I enter a museum, the library, the opera house, etc. So I'd probably permit it, though grudgingly....