Technically, we only had one tenant; she's the brunette in the picture. The other two were subtenants of our tenant (with our permission). For simplicity, however, I'll go ahead and call them "tenants."
We did exclude our studio in the back yard from the lease, and we reserved the right to occupy it. Therefore, the outside areas were "common areas" to which we all had a right of access.
When they lived there, there was only three-hour period of only one day that I had a sign and flag outside. Of course, I had the right to display such things in the common areas for the entire term of the lease. But I didn't, except on one visit, and, again, only for three hours.
For any landlord concerned about property damage and risks thereof, they were about the worst tenants anyone can imagine.
On one visit (announced in advance), I arrived and found nobody there; but there was a candle burning on a nightstand, burnt almost all the way down to the wood stand upon which it sat.
On another visit, I found several flammable items leaning against the pilot light portion of a water heater.
There was a clause in the agreement prohibiting the removal of fixtures without the express consent of the landlord. Nonetheless, on one visit, I found our large crystal chandelier lying on the floor of our studio. It was replaced with a cheap, plastic Home Depot ceiling light.
The lease was a no-pets lease. Nonetheless, neighbors told me that the tenants frequently had a large dog in the house.
I also got calls from neighbors who said that the tenants had loud parties and that the partygoers left beer bottles all over the street in the neighborhood.
We spoke to the tenants about many of these things, and many others, including significant destruction to our hardwood floors. We all agreed to amend the lease so that it would expire at an earlier date.
We never kicked our tenants out, but we probably should have.
There's much more, but for purposes of clarification, this should suffice for now.
It seems 
