Yep! When DH or I say a naughty word (not too naughty, like shut up, damn, bugger etc) and the kids happen to hear they say "Hippoptomus" and we apologise! Also at the table if one of the kids see us using bad table manners then we give them 20c. DS is constantly on the lookout "Mum, elbows on the table - 20c please"!

We don't let them do the table manners thing when we have guests over though, I have told them that other peoples table manners are not their concern.