NPR's guide to the running gags from the show.
There's one rule for the prison's visiting area.
13 episodes feature this joke:
"No teaching!" — George Sr. is threatened for spreading his religion.
Related Joke: ... embraces religion
Michael: "No talking ... once the voting has begun."
No hugging! When George Sr. tries to hug the surveyors who tell him he's accidentally in Mexico.
Marky Bark forgets the one rule of prison when visited by Lindsay.
Sources: Joke data compiled by Adam Cole / NPR. Episode metadata from The TVDB via a Creative Commons Attribution 3.0 United States (CC BY 3.0 US) license.