Tort of outrage
Tort of outrage
Saying things to people can be illegal.
There exist something in common law called Intentional infliction of emotional distress or tort of outrage.
Intentional infliction of emotional distress (IIED; sometimes called the tort of outrage) is a common law tort that allows individuals to recover for severe emotional distress caused by another individual who intentionally or recklessly inflicted emotional distress by behaving in an "extreme and outrageous" way. Some courts and commentators have substituted mental for emotional, but the tort is the same.
- Svenska akademins ordbok, https://en.wikipedia.org/wiki/Intentional_infliction_of_emotional_distress
This is why it can be better to be quiet or walk away or both in many situation. However you can be cornered or persecuted or they can come to your door or they might be in your home.
There are cases where people have been taken to court by their own wife for having said something to her.
To avoid these situations i recommend the use of prayer and casting out unclean spirits from a distance.
Though there are still situation where you can use the sword of the spirit because it is part of the whole armor of god.
Also telling people they are going to hell generally doesn't end you up in court but they might call the cops on you.
If you have an argument with someone, examine yourself that you be in the faith.
If you are being verbally attacked or falsely accused, instead of saying the sword of the spirit to them, like rebuking or reproving them according to the scripture, you can walk away and then pray in your closet to God the Father in the name of the Lord Jesus Christ that he saves you out of it.
Other legal stuff that you can get in trouble with from what you say in public includes privacy rights, defamation and more.
We should follow the law of the land as disciples
(Acts 25:7-8 [KJV])  And when he was come, the Jews which came down from Jerusalem stood round about, and laid many and grievous complaints against Paul, which they could not prove.  While he answered for himself, Neither against the law of the Jews, neither against the temple, nor yet against Cæsar, have I offended any thing at all.