Please take care when you empty out donated bags e.g. during IITB, particularly pre-loved bags that may have sharps or other prohibited items in forgotten pockets.
Do not rummage through the bags, but take care and empty bags out carefully, including checking pockets. You may want to wear gloves if you can to protect your hands.
A good rule is: If you can’t safely see where your hand is going, don’t put it there!