These are three different situations where correction is needed. If offence is given intentionally, the offender should be taken aside and corrected, albeit gently. These three scenarios are played out before us every day. In each case a different approach is needed. How effective correction is in any situation depends largely on how that correction is administered.
Angry denunciation ends only in a flare-up.
Caustic rebuke provokes retaliation. Mocking contempt produces smouldering rage that burns underground for ever so long but finally bursts into a flame that consumes everything it can lick. No one is genuinely humbled by public humiliation. No one is brought to repentance by being taunted or lampooned or laughed at. And of course no one is moved to a fresh start in life by having to defend himself where he's indefensible, to be sure, but where he must defend himself in order to survive psychically.