Is A Borrowed Tee Considered To Be Another Player’s Equipment?

GOLF.com’s Rules Guy answers this question: The other day, I picked up a tee someone had left on the tee box and proceeded to use it. My friend told me this was a penalty, for using someone else’s equipment. He said that if I’d wanted to use it, I needed to have put it in my pocket first to claim that it’s mine. What’s the ruling?

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