Cabin crew or cockpit officers? (smirk!)

Re. the post topic, if they can effectively enforce bans via their blacklist, and put remarks in the booking (such as 'give this kiddo a priority baggage tag'), surely a disgruntled staff member could put that kind of derogatory comment in an itinerary?
Whether they would bother to do that is probably another matter (if you don't behave too outrageously)

Am also interested in this too, if it does exist & pax know about it then perhaps pax may behave more amicably?

There are all sorts of systems/programs/'things' that run behind your booking. When things are added to your booking (e.g. your name, frequent flyer number, certain flights), checks take place to ensure that the booking is of integrity. If things don't go accordingly, then they will get flagged to certain departments. The exact nature of how/when/why is highly confidential.

A simple example is how the booking doesn't accept your frequent flyer number if your name doesn't match the account number.