Crying here at Pungent Trotters and Parmesan-esque shavings
Some of mine:
Do not tell the host she is a 'fusspot' and rolling your eyes when she tries to establish sleeping preferences\sort out other common courtesies.
Do not bring two bottles of wine as a 'gift' then proceed to drink them yourself.
Do not insist your 4 year old child be driven to the local beach after a 7 hour drive especially when he/she hasn't eaten since 7am and it's now 4.30pm. Then proceed to moan that dinner is taking so long LO will be asleep before it's ready. The host does not have children but even she could see that was a daft plan 
Do not phone when you're half an hour away from your hosts house and breezily announce you have the neighbours child with you as well as your own and it will be 'fine' she'll sleep anywhere. Then get the arse when said host tells you she would have liked more notice of an extra arrival.
Do not hammer on my door at 4.30 am because you got upset at a party and your husband 'doesn't care' - then proceed to force me to listen to you screeching and wailing for two hours before even saying good morning.
That was very therapeutic :)