mutilating yourself and sending bits of yourself to someone you feel wronged by is not normal behaviour. I don't think anyone is wound up so much as really rather taken aback.
I also don't think chavveling bits out of yourself and posting it to someone is likely to make them think gosh, clearly I made a huge error of judgement leaving this person because they're totally fine in all ways. It's just going to make them think perhaps they really should go to alaska after all.
Yeah, it's her body to do with as she likes but posting bits of yourself to someone really crosses a line.