I guess I might have to start packing my bag with dirty undies again.
The article doesn't mention this (which is a terrible Globe oversight), but I believe you can still refuse the searches, and just walk out of the station. You can't refuse them if you want to enter the station, but you can just say "No thanks.", leave, and try to enter through a different station. I think this is partly why they were held to be constitutional, and stupid.