Can you eat acorns picked from the street?
Acorns from which tree?  Acorns from California live oak for instance are edible, but only after a painstaking process of grinding and soaking, without which they can kill you.  European oaks have acorns that are more amenable to eating, but they really can't be eaten raw.  And even the French don't as a rule eat them, which tells me they can't be that tasty :-)