I personally havnt had to leave a property. But I've had to ask a couple of people to leave my property.
They were stealing food, hay, water (I know that sounds silly but we're in the middle of a drought and have strict water usage requirements etc. They were filling up geri cans and taking them home for their own use). And moving horses around without permission.
Not to mention they also tresspassed (more than once) into our house, accused my dog of attacking them, and blamed the grass on the property for killing 2 of their horses (although they seemed to ignore the fact that the 18 other horses on the propery had never been sick, and that they were stealing food that their horses were'nt used to so there you go!)
Gosh I LOVE running a barn!
Haha, ok in all seriousness they're the only bad cases I've come across. Touch wood!