At my current place, the entire 3 or so acres around the buildings is lit up with 2 big old fashioned (1970s) sodium vapor street lights, it doesn't fully light up the entire area but it lights it enough so you can see even on the darkest night... Between the lights my llamas and my dogs little goes unnoticed around the property... The llamas are likely not going to scare off people but when they sound off the dogs join in...
I do have a problem with people using my drive as a turn around, wouldn't mind if they just pulled in the edge of the driveway and did a three point, but because it's a 4 lane highway they come all the way to the house to turn around and I don't like that one bit especially when the kids are outside playing or I have stuff laying around the driveway/garage area, getting ready to put up an agricultural gate across the drive to prevent that...
At my moms house growing up we used to get the random religious solicitors and scrap collectors (likely thieves) coming up the driveway on occasion, but once we started to greet them when they got up to the house with a holstered (in clear view) sidearm on the belt they all the sudden stopped coming... A few years back they started to show up again, so my step dad who is into 'Cowboy Shooting' started to meet them with his full decked out cowboy six shooter and belt full of bullets when they got to the house, and same results they all the sudden stop showing up...
Have a friend that put up a decent sized sign on his drive that read something to the effect that "Private Drive, any trespassers past this point, will be detained by force and charged with trespass" he said that worked well for him...
