In the south I've seen people eat the entire boiled peanut. There was a guy in Lillington NC who moved there from Buffalo NY who used to sell boiled peanuts in butter and franks hot, and people ate them whole. He disappeared one day around 2007 and I've never seen nuts like his since.

Huh, looking online they're all over now. Even at Walmart

Was confused for a second, because I don't generally think of peanuts as having a shell, but then realised that you must mean the outer pod / husk that they're sometimes sold in. We call the whole things "monkey nuts" here.

... but despite the fact we have a name for the whole thing, we only eat the peanuts inside.