Different countries must have different standards for that. Here, the result would be that the person owning the staircase would call a cleaning firm and then send the bill to the person, in combination with a warning that eviction may happen if further misuses of the property occur. If it happened every other week, the person would be evicted, and I suspect the bills from the cleaning company would be enough to make that happen regardless.
If they couldn't identity the person they would setup cameras or a passage system to identity who uses the staircase until the problem can be solved. The law here allows apartment owners to setup cameras in the case of resolving problems with property and shared spaces. For example, in my building there are cameras in the garage and the garbage room, and entry require tags that get recorded when opening the door. Those intrusive actions where done to address past theft and misbehavior which in turn cost money to the company who own the building.
The end result of this is that every place becomes locked down and covered in cameras, which is very expensive, and which also kills off the few remaining quasi-public (privately owned but freely accessible) spaces. All because we couldn’t figure out how to help or manage people with problems.
If they couldn't identity the person they would setup cameras or a passage system to identity who uses the staircase until the problem can be solved. The law here allows apartment owners to setup cameras in the case of resolving problems with property and shared spaces. For example, in my building there are cameras in the garage and the garbage room, and entry require tags that get recorded when opening the door. Those intrusive actions where done to address past theft and misbehavior which in turn cost money to the company who own the building.