Goodwill stores wouldn't be able to continue without donations. That doesn't mean you can donate whatever you want, however. For example, it's best not to drop off a hand grenade.
While going through a box that was dropped off, an employee at the Placentia, California store spotted the military weapon. Understandably, authorities were called and to air on the side of caution, a bomb squad was called in to remove the grenade safely.
Police are investigating, but all we know is that a woman dropped off the explosive donation.