If that is the case, the system should not permit the passenger to OLCI and print any BP information. Otherwise, as has already been pointed out, someone can use the dreaded print to PDF routine of modifying the BP prior to printing to physical paper. Either apply security principles and deal with the fallout from FF that get pissed off about having to check in with a TA, or admit that it is a sham and stop issuing "not valid for security" OLCI documents.