Geez,, I don't know John, I have had many trailers for over the past 25 years (dating myself.. LOL), and have never had a lug loosen, on the contrary, just try to get them off after a couple of dunks in the salt. I use neverseize on all lugs now, and loosen them and re coat in case I get a flat I know they will come off.
IMO, I think he was being messed with.
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