You must act appropriately to a sneeze. Here are the rules for bless you.

1. If the person is sitting next to you, say bless you.
   
2. If the person is two people away, then there are some conditions. If its loud, then say bless you. If it is quiet, use your judgement and whisper.
   
3. If the person is more than two people away, it is out of your jurisdiction.
   
4. If the person is in front of or behind you, see #2.
   
5. If the person is a friend, the jurisdiction extends by two bodies. No exceptions.
   
6. If you are attracted to the person, you must say it.
   
7. If you are in church, then say "God Bless You."
   
8. If you are German or named Uncle Larry, say "Gazoontite."
   
9. If someone sneezes on you, then have no obligations. Do as you please.
   
10. During a multipe sneeze episode, bless once after the first sneeze and once after the last. Blessing each time gets tiring.
    

That's all I've got for now. Any additions?