What is the WORST thing a tenant has done to your property?

[Mindy Jensen]

I've heard the horror stories from landlords about how the tenant they were evicting poured cement down the toilet, played hammer darts in every room, ripped out the copper, or left piles of garbage for the landlord to clean up.

This hasn't happened to me - my last tenant just left untidiness that took me about an hour to clean up. I wasn't happy about it, but I sure preferred picking up used tissues to digging out and replacing a toilet outflow pipe.

What's the worst thing a tenant has done to your property upon leaving - through eviction or on their own. (I didn't evict my tenant, he was just a slob.)