True. I know several ppl who have done that.
Having had a homebirth, it's not that 'weird' in my mind. I know women who were hemhorraging after their births and when a piece of placenta was placed under the tongue, the bleeding stopped. People make placenta prints, too. Lay it on a piece of paper and then remove it to let the paper dry. You can also dry it, grind it, and put it in little capsules and swallow them. There are TONS of placenta recipes out there, too.
It's not something I would go and do, but whatever works for them.
And I certainly wouldn't cook it up and eat it.
As for Tom.... Ugh. What a whack job. And since he changed his mind so quickly about eating the placenta, I think he probably said that for shock value.