In four years on here I can't remember seeing anybody taking about themselves projecting emotions onto other people. I have to agree that, at least for myself, I would consider such an action inappropriate (and, yes, bordering on unethical).
Protecting yourself from their emotions is fine.
Sending them positive energy WITH THEIR PERMISSION is fine.
Sending them positive energy PASSIVELY without their permission (just by being around them) is fine.
Actively working on them in any way without their permission as, at the very least, highly suspect. The analogy I have used in the past is: How would you feel if a friend of yours let themselves into your house and started cleaning and tidying your home without your knowledge or permission?
Ummmmm.....actually....if someone let themselves into my house to clean it I REALLY wouldn't object Trevor....lol....i'd consider that a gift!....lol....