I modify mine (not Moultrie) cams with high strength u-bolts and then fasten it to a tree with a masterlock Python lock. If they want the cam bad enough they can just cut the tree down. I have heard about this happening. I know I pick larger trees to secure them to than last year. I had a 35mm stolen last year and they cut my 1/8" cable lock I had on it so I moved up to a beefier one and just to see placed the cam al season in the same location and it made it through and no cut marks on it, so either they didn't think they could cut this cable or they did not like the one they took last year. I have gotten brave and placed a digital on public ground and got some great pics of some nice bucks and quite a few hunters also. Even one that looked and turned that cam but decided he could not get it off the tree and left it.
Hope this helps ~Jeff