Charlotte Lehman could hear the man reading his credit card number out loud from across the Starbucks.
He was speaking to a companion, but his voice carried over the music to where Lehman sat. Surrounded by a dozen or so people, the speaker also divulged his phone number and home address.
After that, all it took for Lehman to identify him was a quick Google search. She was able to find the man's full name, what he does for a living and his professional website. She even heard him sharing a password.