Can you bake premade pie crust in metal baking dish different from aluminum disposable

Or make a slab pie (square or rectangle) or a free-form rustic one (round with extra dough folded in over the filling) on a sheet pan.

It might be difficult to shape, but there's no reason it won't work...The problem I see is that since baking dishes are usually straight sided, and pie plates are sloped, the sides of the crust will probably cave it. If you line the pie dough with greased foil or parchment and fill it nearly to the brim with beans/pie weights/rice, you'll probably prevent that, but it's a small risk.

Out of curiosity....why not a disposable dish? I bake pies almost exclusively in those buggers and never have a single ounce of regret. People are getting pie....they shouldn't be judging the vessel it came in.

I don't see why not, having a square pie would be fun! Cook times may change so keep an eye on it.