People also do that to get insider info to trade on or for industrial espionage/competitor spying. They'll hang out in the lobby of a building, coffee shops nea

People also do that to get insider info to trade on or for industrial espionage/competitor spying. They'll hang out in the lobby of a building, coffee shops nearby, appearing to work while eavesdropping and taking notes. At my last bigco job, I was advised not to discuss company matters outside of the office.