Sorry, but that lifehacker idea seems bad to me.
The fumes/overspray has no where to go except back at the person doing the spraying.
I have a Badger spray booth now. Before I did, I made a very inexpensive one out of a cardboard box. It lasted until I got the Badger booth.
I turned the box on its side, so the bottom became the back.
I mounted four 12 volt muffin fans (purchased surplus) in bottom/back, and powered them with a Lionel 0100 transformer (HO).
Then I placed a furnace filter in the box, an inch or so away from the bottom/back.
Those four fans really pulled air through the furnace filter.
I used this setup for water based paints only. It would not be suitable for spraying anything that was solvent based, or with dangerous fumes.