I play with people that just can not shut up. Advice, why did you do that, He's out, games over, don't be so serious, you're gonna miss. I asked them to kindly be quiet when I'm shooting and that bothers them also. I asked them would it bother anyone if I critiqued your Golf, Card game or Bowling while you were up to bat and immediately afterward.
General rules of courtesy: Respect other players
Pool is a competition, but it is also a social activity. The other players want the same opportunity you do to plan and execute shots without rude interruptions.
Don't shark. If what you are doing would distract you while shooting, it probably distracts other players, too. Here are some common sharks. Avoid them!
Doing anything vocal while your opponent shoots (talking, coughing, clearing your throat, humming, whistling, etc.)
Making noise while your opponent shoots (dropping stuff, chewing loudly, cracking gum, tinkling ice cubes, tapping fingers, etc.)
Moving deliberately within the shooter's field of view (lighting a cigarette, chalking your cue, walking near the table, making sweeping hand or arm movements, etc.)
Standing at the table, especially behind the target pocket.
Don't coach other players unless they ask for advice. Unsolicited coaching is also a shark.
Don't turn lights on or off while someone is shooting.
Don't criticize someone's game and don't make excuses for your own misses.
Don't hustle.