This level of extreme mod is probably more common than you expect (while still very rare). The body mod artists (don’t think that’s the word they use but it escapes me) are always booked out months or years in advance.
She isn’t nearly the most extreme either. The black alien body project has had his ears, nose and a couple of fingers removed, plus facial scarification on top of his black work. He had a penectomy and more finger removals planned this year I believe.
As the research paper posted earlier in the thread states, if people with BID aren’t mentally ill, then neither are these people. Not that they CAN’T be mentally ill - but it’s not the reason they’re doing this and it doesnt apply to all.
I actually feel like subdermal implants will end up taking off soon - little dainty ones, similar to how line work tattoos are big. Pain in the ass to heal and they hurt, but if you change your mind they’re totally removable. Even more so than a tattoo.