Intentional misgendering as punishment comes up a lot in cases where a trans person is openly against one's views, or has committed a crime.
High-profile examples include Caitlyn Jenner, Christine Chandler, Chelsea Manning, etc.
As with many things, the people you target, especially high-profile personalities, often won't even see your messages to begin with. The ones who will are the trans people in your own life.
And what they'll see is that you don't sincerely believe that trans women are "actual women" or trans men are "actual men".
Why? Because if it's something you apply as a courtesy to only people you respect, then it means you don't actually believe it to be universally true, that people who identify as a gender are that gender.
If you respected the self-determination and agency of trans people, this wouldn't even feel like a thing you could take away from them.
That's why it's a problem, and it's not worth doing, even to people you really dislike.