“The Dangers of Broken Electrical Outlets” Electrical outlet receptacles provide such constant, convenient use that it can be easy to forget that they carry an electrical current that is shielded only by a thin layer of rigid plastic that covers the inner metal parts of the receptacle. Over time, the plastic faces of a receptacle can dry out and crack, and you've likely continued to use a damaged receptacle, never really considering the possible danger. Cracking is particularly likely on old outlets, which were manufactured from hard bakelite, an early form of plastic that is very brittle. Similar danger can exist even if it's just the cover plate that is cracked or otherwise damaged.
Here's a look at the hazards you can be exposed to if some of those plastic parts are cracked or missing which you must read and ensure to stay away from