A law in Florida from 1869 states that if a person takes over a home and the real owner doesn't claim it back within 7 years, then it belongs to the person who took it over. (See: Squatters' Rights).
With all of the home foreclosures all over the country, there are literally thousands of abandoned homes and businesses have sprung up to take possession (without paying a dime to anyone) while hoping they can ride out the 7-year period. These businesses are even renting the homes to tenants...homes they do not own.
Shady practices is an understatement.
Here's the full piece.