Nabi (sallallahu ‘alaihi wasallam) said: “Two persons should not whisper into each other’s ears in the presence of their companion (a third person) for verily that will cause him grief.” (Sunan Abi Dawood #4851)
Man’s nature is such that when two people are whispering to each other in his presence, he automatically feels that he is being discussed, though most of the time this is not the case. Nevertheless the teachings of Islam are so refined that it does not even allow such a situation to arise which could be a source of pain or grief to the next person.
Furthermore, this hadeeth teaches us to avoid doing such things that will give others an opportunity to have suspicion and doubts regarding us. This will also apply to going to doubtful and suspicious places.