Well for one thing you'd have to actually be "trespassing." At it appears visiting an apartment in a building is not trespassing since the apartment owner has the authority/right to have guests. That authority/right supersedes a property managers dislike for a certain individual. In fact, let's say it's a co-op and the tenant owns the apartment. Then the issue would probably be up to the co-op board as well, not just the property manager. There would have to be a very good reason why an individual would not be allowed on the property, and the reason would have to be that they are posing some risk to the property or other tenants. The fact that it's a former tenant who was evicted doesn't necessarily mean they pose some risk. The property manager cannot exclude a person from entering a private apartment just because they have some personal dislike for them.
You say "there are legal ways for a landlord to make life rather difficult for the ex-tenant" but keep in mind that the ex-tenant is not a tenant anymore and has no legal contract with the landlord anymore. Making life "rather difficult" for someone is risky because one could be charged with harassment, and of course it's also immoral. I understand that a landlord could actually direct his/her revenge against the apartment owner/renter if they invite a guest the landlord doesn't like, and that clearly would be harassment against the tenant and a violation of their rights. I think there are also differences between small building with one landlord and co-ops who have a board of directors in how things like this might proceed. Of course, legal isn't always equal to fair, the law is often wrong and unfair, and in many cases judges don't even follow the law and make wrong, negligent, and even abusive decisions. Luckily there are laws protecting innocent people from harassment by others who happen not to like them and hopefully those laws are applied properly.
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Well the eviction order was specifically for the apartment, not the "property." I guess if it was a house the order would talk about the "property" but in an apartment building that would not be the case because the issue is the apartment itself, not the building. As I mentioned earlier, what if you owned another apartment there, or maybe a daycare for your child in the same building or even a doctor, medical center, psychiatrist, a dentist, a teacher, or a grocery store that you frequent or other business (this is common in New York) so that would not make much sense would it?
Well there is an open case against the police and it would nice to sue the landlord too.



