How to avoid trouble with tenant that creates accusation?

[Marcin Wrona]

I am just curious how to protect myself from tenant accusations of hurting himself in the house because of things like: - "the doors are too narrow and I am disabled" or "your stairs or stair case to the patio are too steep I fall and hurt my ankle" do I need insurance for things like that or can I have it worded in the lease agreement that the tenant accepts the condition of the house and won't press any charges if he /she hurts himself??Anyone had situation like that or heard about it??thanks