No reason for no.6, how sensitive and unstable of a douche must you be to get upset about someone enquiring about potentially buying your chattel.
I can understand no.8 but at my meets/in my games room this is mandatory. Cup caking is optional though.
If you consider yourself an experienced player don't feel it is your duty to school a rookie on the rule set of the game. If they want your help they will ask for it, if not let them grow into the game at their own learning curve.