Some people!

[simplepeddler]

Now that is low........
Trail cam will work.

buddy of mine caught his so called friend stealing his corn for the feeders that way.
Once you find out.
I would be all "low key" about the pay back.
like go to the local hair styling place and ask them to save you a buscel of old hair of the floor.
Spread it all over thier place.
ususally no one notices the hair except the deer..........will lock them out period.
Or at least I heard that it works LOL