A druid can hurl stones from a sling without penalty. But if he throws one using his hand, he loses all his druidic abilities for a day?Druids are proficient with the
following weapons: club, dagger, dart, halfspear, longspear,
quarterstaff, scimitar, sickle, shortspear, and sling. Their
spiritual oaths prohibit them from using weapons other than
these. They are proficient with light and medium armors but are
prohibited from wearing metal armor (thus, they may wear only
padded, leather, or hide armor). They are skilled with shields
but must use only wooden ones.
He can swing a club just fine, and can swing it in two hands just fine; but he can't use a great club without breaking his vows (profficiency penalties aside). He is profficient with a shield, but can he swing bash someone with one without getting in trouble?
What if he throws a tankard of ale across a tavern room? Or even a dart at a dart board? Are the Druid Nazi's going to report him?
Does it even say somewhere that a druid is allowed to attack unarmed?!