THank you-- great details. I was really hoping you had all the reasons in the world why this could NOT be done!! I can see meal worms taking over my house. lol I will start small though and see if I really have the guts to fill the drawers with a couple inches of bran.The idea of using an older dresser is a great one! One thing, though. You will need to make the sides slippery and smooth so the worms and beetles can't get a grip on the wood grain to make an escape. If you have some scraps of linoleum, that would work, or line the drawers with 6 mil (heavy) plastic.
I would also line the bottoms of the drawers in case the beetles might develop a taste for wood. They love to eat newspaper, so wood might be on their menu, too.
Beyond that, there's not much else you'd need to do, unless you want to cut out holes in the drawers for the eggs to sift through.
No, no need to keep the drawers ajar.
How does everyone handle company coming over to visit??