Yes to everybody. No to none.
Kindness creates good karma but risks the occasional backlash. Instead of holding the door open for one, you end up holding the door open for all. Instead of helping one kid on their homework, you help the whole class catch up.
If kindness is your prerogative, you already win at the game of life. There’s really no competition but yourself. But offering free services makes you vulnerable. People manipulate nice people.
Toughen up and treat yourself with the same respect. Be the milkman of human kindness.