I always try to give back as I am given (minus handling charges, of course...
I try not to always give in kind to what I receive.
IMHO, people give each other too much grief.
So even if someone gives grief to me (or at least aims it in my direction with my name and address on it), doesn't mean I have to accept or receive it as mine.
I can decide what I want to give back if I want to give back at all (often this can reinforce and perpetuate the interaction).