X-Mod opinion here:
This is by far one of the most annoying things I've seen on the forums and it honestly makes me not want to change my profile picture. I can't change it without 2-3 people annoyingly repeating this tired joke and me having to tell them directly "Please don't" and delete their comment. I've only gotten to this point because not only am I tired of seeing it on everyone's profile but on my own dozens of times. Now that they are doing it intentionally as well to "carry on the joke" it's purely trolling. Look at the responses from those who claim to do it, none of them take this seriously indicated by their posts which ultimately proves the point. The images shared are good examples of how silly this whole thing has gotten.
I also want to give an example of normal examples of discussing profile picture changes for reference:
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Here me commenting on her profile is of relevance because her picture is a snapshot from a game called Genshin and it means she has that character I was inquiring about. Another example is if someone like me for example changes their picture to a cat, it's fine for people to people say "Cute cat" etc.
But the copy/paste "PfP cHaNgEd" on EVERYONE's profile all the time, whether they are purposely changing the profile pictures to do this more or not is completely unnecessary.
I have nothing against these people, and my response is not an attack on them, I'm simply providing my POV on the situation. I think this "joke" is really tired and needs to stop. I don't know think punishment would be something agreed upon by the team, but something needs to put a stop to this kind of behavior.