The article is using as a source a 4chan post that had a docket number that didn’t check out. I’m pretty sure this is a joke someone took seriously because they needed to publish something today.
This would get almost immediately dismissed by any judge.
It really depends. One tenant could have an ant problem because another adjacent tenant is attracting them, which the landlord needs to address. If the structure has decaying wood, that can attract carpenter ants which is a landlord issue. Some ants like humid environments, so a poorly ventilated structure (like one with mold) could be the cause–also the landlord’s problem.