Come Here.... Four Feet to the Left

In real life, if you have a secret you have to tell someone and you're in a public place, you go into the bathroom, or tuck away in an empty isle, or move way to the side, whisper and try not to make eye contact.

But in television, if someone has a secret, even if it's life or death, and they have to tell someone in public, they begin talking about it... Right there in the middle of the hotel lobby, with people passing by them in all directions. Then they quiet down slightly and pull the person their telling over a bit, as if moving four feet to the left of a crowded lobby makes it any less private.

This conversation is being had in a normal speaking volume in the middle of a crowded lobby:

Man: "Hey, are you the lawyer handling the Billings murder case?"

Lawyer: "Yes, I am...Why?"

Man: "I might know who killed Mr. Billings..."

Lawyer: "How? I was told there were no witnesses..."

After the man uses a normal speaking voice in public and tells the lawyer that he might have seen who the killer was, he then decides to signal the lawyer to move over, as to make the conversation more private. However, they move just a couple feet over. They are still in plain sight. They are still talking in the same volume, only now they're stand 4 feet to the left.

This happens SO many times. Is it so hard to have the actors speak in private? Like the elevator of the hotel, or instead of moving to the left, they duck into a meeting hall in the hotel? Or are we supposed to be dumb enough to think that the 8 people who were standing 5 feet behind them at the check in desk never heard the word murder?

Who has such a serious conversation in public?

In real life if a witness to a murder, openly said that they saw the murder, it would not go unnoticed... and they'd probably no longer be a witness.