sumisu: ah yes, yet another paradigm shift from conventional gardening mythology. Weed is simply a concept. Dandelion and squirrel were two common foods that I ate, as a boy, growing up in rural Connecticut. The forest was a natural food forest with beech nuts and birch bark and twigs along with fiddler ferns and low-bush blueberries and wintergreen just to name a few. These "weeds" lend themselves well to temperate food forests.
IxCimi had an excellent post on tropical/sub-tropical food forests a number of days past.
"Keep your state off of my body"
"When in doubt, empty the clip."