I usually keep a 3-4 cams on public, and 1-2 cell cams. Like others have mentioned, I put them up higher at 8-10 feet. I also removed the strap and use some cheap camo paracord I pick up at a local store. And I don't use expensive cams either - $40-50 for the regular cams off Amazon, and cheaper cell cams which were $100/ea. Would it suck if they were stolen? Sure. But I would be more inclined to find someone if they stole a Cuddleback system vs a $40 cam off Amazon
Karma will still get them at some point.
I have not had any stolen, but my cams have only been noticed on 2-3 occasions when I'd mounted them lower. I'm also usually deeper in the woods since that's where the deer are at
I use a piece of angle cut wood like GreginPA if I remember to bring one, otherwise I use a piece of stick from the ground and try to make it not stick out further than the camera if I can.
On the paracord side, I used to use timber hitches or trucker's hitches to cinch it to the tree. This year I switched to some hammock gear:
This hardware works great with 1.5 to 2.5mm cord. This works just like the LineLoc 3 but has a hook the connection point.
dutchwaregear.com
I tie a bowline loop on one side of the paracord, then run the paracord though the camera where the strap normally would go. I place a line-lock on the other end so when I wrap it around the tree I hook the line-lock to the bowline loop and can cinch it down faster. I roll up the excess paracord and tuck it behind the camera so it's not swaying in the wind.