Well, this is why most people (including myself) put rental property under an LLC. I wouldn't let a tenant sign the lease as a corporation unless they were a legit corporation - you know, companies rent houses all the time for executives that relocate, etc. If the tenant breaks the lease, I'd sue the company and their assets.

Real world example: I did a summer internship one year and the company rented a few houses for the interns. Myself and 2 college guys were in one. Landlord claimed damage on the air conditioner because it iced over due to not changing the filter...ended up getting money from the company.