How bad could it be? They’d all be piled up at the bottom of one stud cavity and you know they’re there. If you’re demoing the wall you’re gonna have gloves and a shop vac and a bigass broom and shovel anyway.
Still I got a little blade bank (about the size of those mini soda cans) on Amazon for $7 for my double-edge blades. Last year. And it still has plenty of room in it. Supposedly it holds 300 blades. That’s two blades a week for nearly 3 years. An absurd frequency…I replace my blade every week and I shave my head and they could totally go longer, they’re just so damn cheap.
I think these plastic boxes the blades come in often have a slot for used blades on the bottom.
They take up so little space without the paper around them that an entire pack fits into a 1mm slot maybe.