Wow, that's a pretty extreme reaction to mashed potatoes with skins. There are some foods I don't like, but I've never wanted to smash a waiter in the face over a side dish.
Mashed potatoes with some skin on them is a country style mash, not "pig food," and most of the nutrients in potatoes are in the skins. I make that style of mashed potatoes whenever I serve them with rustic country foods like chicken fried steak, and yes, meatloaf.
If I am serving something more "posh," I'll use pealed potatoes, run through a ricer, and pureed.
CD