A few years ago-I made the mistake of renting my home while out
of town for a year;  used a prominent local renting service.   The house
was rented by a woman of 30 but she gave the keys to her brother who
was a student and left town.  

The rental service called me and said would not believe what happened to 
my house...the damage was many times beyond the deposit.  I had the option 
of going to court for damages but decided not to.    Liquor bottles and beer
bottles everywhere and who knows what else.   Animal leavings and bleach 
poured on the carpets.   They even left all their belongings...even shoes.  
Legally-I had to keep everything for a certain number of days before giving 
them way;  no one came forward to claim anything.  The crew that helped me
 said that this leaving of property was common.