You may want to add a little sign, about the size of a business card (so it can only be read up close, by a thief) to the effect of "you scurvy motherf*g thief, I have game cameras watching this, and other cameras watching the cameras. If you're reading this, I know who you are." Rivet the sign to the pipe; you may want to put a code (not your name/address) on the hidden side.

I think the thieves are either vandals, scrappers, or putting your nest boxes on their land.

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