During my days as a property manager, I had guests that were not welcome to come back to our properties for well documented reasons. I simply had an index card box with names. Really didn't need the box, we seemed to remember the names if they called again to make a reservation.
Things to do to get on the LIST: not pay your rent or cancel payment, unruly and have disturbed other vacationers repeatedly, have a pet, obviously smoked in the property, rent in your name for your kids and their 50 friends, make repeated complaints because a minority is swimming in the pool, try to sue because you contracted AIDs swimming in the pool, stealing furniture, check out a day late prohiting the next renter from a place to stay, accidentally shot a firearm in the unit and leave it when you check out, then demand we mail it to you..............it seems I can go on and on.
I did not share this info with other agencies because of liability issues.