(DISCLAIMER: I am not a parent. This is going to need some revising. Just something I whipped up after years of observations).
Thou shall have clean hands before playing pinball
Thou shall not wipe thine hands/eyes/mouth/nose/ass crack before or during playing
Thou shall not cymbal monkey(rapidly tap) the flipper buttons
Thou shall finish the game that is thus started
Thou shall hit the start button for the correct number of players playing, no more, no less
Thou shall not pull the plunger out like it’s the sword of Exclaibur
Thou shall not stand in front of a pin unless they are playing it
Thou shall not stand near the outlanes with your head hovering over the playfield while someone else is playing
Thou shall not place thine beverage or food on the playfield glass.