Knowledge November - Day 2 - Don't say it
Don't ever say "Don't take it personally" to anyone.
When you say "Don't take it personally", you're asking someone to accept an insult or an injustice, be publicly humiliated, do your dirty work, lose their job or do something potentially horrible to someone else (like fire them).
It is a meaningless phrase that is often only used to make the utterer feel less bad, not the sufferer.
Saying "Don't take it personally" means that you are also belittling that person's genuine pain and hurt feelings.
Think of it this way: If I came up to your house out of the blue and slapped you across your face and then defecated on your front door step before issuing you with a 'Don't Come Monday' slip, you wouldn't want me to then turn around and say, "Don't take it personally," would you?