"Oh, say, Mr. Comics Publisher, I hear you're gonna put out an issue of Wonder Woman where she gets captured by the Spankinator and has her bottom paddled for 18 pages. I think that's offensive and degrading to one of my favorite heroines. Could you stop it, please?"
"You misogynistic bastard! How dare you drag a feminist icon through your lurid fetishes! I demand that you turn the character over to respectful creators THIS INSTANT, you pig! Boycott! I'LL BOYCOTT!"
Both attempts fail.
"But Anon," you may be about to say, "I thought you were all about the being nice and here you are saying nice doesn't work oh I have you now, hahahaha!"
Well, it occurs to me that some people may not actually know how to be nice effectively.
The goal is persuasion, the changing of minds. In the first example, the language is polite, but all that is said is "this offends me, please stop".
And realistically, that's no reason to do anything. People get "offended" at the drop of a hat. You can't do anything in the public eye without someone being offended. What makes your sense of offense any more important than someone else's?
What you need to do is wrap a valid reason to change up in your nice presentation. What is that reason? Beats me. What you think may be valid is not necessarily what the person you're trying to change thinks of as valid. You may have to do some fishing around, to find out at what root point your opinions diverge, and then begin working on that spot. Then you may have to move on and work on another spot. This is not a game for those without patience.
As for the second example: if you think that is a viable shortcut, I believe you are deluding yourself.