George Washington studied Rules of Civility & Decent Behaviour based on a work by French Jesuits in 1595. In showing what people should not do, I find such guides helpful in defining bad behaviour. For example, based on these rules, you would: 

1) be disrespectful,

2) put your hands on some private part of your body,

3) sing to yourself with a humming noise,

4) drum with your fingers or feet,

5) cough, sneeze, sigh or yawn,

6) fall asleep when others are talking,

7) spit into the fire,

8) gnaw your nails,

9) bedew someone’s face with your spittle,

10) kill fleas or lice ticks in company,

11) turn your back to someone who is speaking,

12) puff up your cheeks or loll out your tongue,

13) read letters, books or papers without asking leave,

14) laugh too loud and too much at a public spectacle,

15) look men of quality full in the face,

16) run in the streets with your mouth open,

17) ask someone how they came to have a blemish,

18) laugh in the presence of a superior,

19) scratch, spit, cough and blow your nose at table,

20) use your greasy knife to take salt or cut bread,

21) blow on your hot broth,

22) spit out the stones of a fruit pie onto your plate,

23) throw something under the table,

24) drink and talk with your mouth full,

25) clean your teeth with a table cloth napkin, fork or knife.

Number 9 is especially annoying, don’t you think? And don’t you just love the word “bedew”?