better solution access stuff via ssh graphically another desktop machine for all work and browsing...last access remove the ssh key

than when CBP ask for password give it and watch them search the laptop..

You full filled your legal obligation to follow their orders despite the illegality its now their problem they cannot find anything

Note...all social public stuff is searchable on google..tweets facebook postings etc..

CBP never needs a password they are searching with that password for other reasons than the ones they GIVE