We live in a county with a high rate of government assistance, and are in between the big city of Lexington, and some of the most impoverished counties in the nation. Very high percentages of people are drawing checks and not legitimately working. Then with drugs of all kinds rampant. We now have a homeless shelter and at least one area where homeless "camp". Lots of crazy stuff goes on. Locking doors is just a formality that just keeps honest people out, but it is recommended here along with burglar alarms.
We also keep our gates locked. Have had people try to break through gates a few times.
A while back we went on a trip to visit wife's family. Had a friend to stay in the short term rental house to keep a watch on the property at night and take care of the dog in our house. Also had a another friend and neighbor take care of the other animals and let the dog out at a different time.
The friend that was supposed to stay decided to let her brother who needed a place to stay, stay in the house instead of her, without telling us until the day before we left to come home. We know him and have tried to help him and give him work at times, but he is pickled and even though he can do a lot of construction and remodeling work he can't or won't keep a job. We had previously let him borrow our truck while working for us, but afterwards had decided we would never do that again for anybody, after having reason to believe he and another brother had something to hide. Too much risk in letting somebody else use your vehicle and especially if they are doing something they shouldn't be.
So yes we have been too nice at times.
Anyways, we suspect he may have been using our place for nefarious things while we were gone and his sister is completely oblivious.
After we got back home, several vehicles were coming in the drive all hours of day and night. We also heard from our neighbor and friend from church that came by to check on things that someone told him there was a truck full of people in our yard at one point.
I stayed out with all 3 dogs till late several nights. Made our presence known and funny how those vehicles whipped right back out of the drive as soon as they saw us.
We mentioned it to the lady that let her brother stay here, and said that we would be reporting the activity if it continued, and coincidentally it seemed to stop.