Since they'd have to send security to tackle you and hold you in the backroom until the police arrive, you freeroll a chance of being able to sue them for battery.They don't want to get blamed for making a scene. If you only show up once every 6-12 months and you leave promptly when they tell you to, it's not worth the pit critter's effort to try to have you arrested. It's probably more paperwork for them if police are called or security manhandles you. From the pit critter's point of view, they just want to avoid work and avoid blame.It's probably hard to prove that an unrated player was 86’ed months ago, or find any evidence that could be used to prosecute you besides some pit critter's vague recollection.Risk Management may have decided that the possibility of a lawsuit because of illegal conduct by pit personnel and/or security guards is a bigger threat to the casino’s bottom line than an occasional unwelcome patron returning. Even if they want to call the police on you, they're not going to risk a lawsuit by tackling you to prevent you from leaving before officers arrive.

Even if they do remember, they're just going to ask you to leave again.If you're playing unrated, it's been at least six months since you were 86’ed and you were also unrated when you were 86’ed, you're unlikely to get arrested. ( A well-known team leader) often goes back to casinos he was 86’ed from, after at least 6-12 months (an arbitrary length of time). There's a significant difference between the letter of the law and the practical reality. In theory, they can last for the rest of your life.

Scrooge McDuck: No, they do not automatically expire merely because of the passage of time. Do trespasses automatically expire after a specific period of time and have to be reissued to remain effective?

Reasons to be 86'd from casinos