I haven't looked into it in the slightest, but I was just thinking that it probably wouldn't even take all that much work to just create a userscript that just pulls that information from kbin or mbin (since it doesn't even require being logged into to view) and have it easily accessible on every post, no matter which instance you are apart of. Once made public, anyone can install it with a couple clicks.
Wouldn't it be better for people to assume it is easily accessible information and treat it as such instead of giving themselves a false sense of privacy or thinking that it might protect them from being dragged into a conversation?
I hate it when my rectun goes floppy, it's a real hassle when giving birth.