We have thick hedges of Ragusa Roses inside our wire fence. They are miserable if you even brush them (think of a hundred splinters). They surround the entrance, side and part of the back fence. One time, maybe 20 years ago, we were going into the back yard and found a pile of id, credit cards etc. Someone had stolen stuff and was running the yards, and jumped over the fence in the dark into the roses. They must have been hopping in the dark in pain and just left everything. We called the cops and they came and gathered up the items the thief left behind.
My neighbors on both sides have pit bulls, they're barking machines, even when we go outside and they know us. When they all get going it's hard to tell where the barking is coming from. We leave lights on in the driveway and the porch.
Normally one of us is home 95% of the time. It's rare that we are both gone. And even if we are there is always one of the vehicles in the drive (we have 3).
If that doesn't deter a thief, there is always lead
.