common courtesy

Salam.

You dont go to other person's house and redecorate it ;
no matter how classy your interior design's ideas are.
You don't alter the chef's recipe in his own kitchen ;
no matter how good you are in cooking. 

UNLESS you are being asked or welcomed to do so.

This common courtesy message is brought to you by your common sense.

p/s: just great. with more assignments. im writing more often.