I stole the quote and tried to pass if off as my own work to a pawn broker I know, but he said he'd already been offered the same quote by another author and since he wasn't sure of the origin of the quote he suggested I put it back till its provenance could be established: wouldn't you know, with my luck I had chosen Chesterton's fence.
Not to be too meta, but it's slightly more common these days than it was a decade ago I think. Likely impossible to avoid with the sheer growth of the place. That said, that kind of very smart humour has always been around here