I figure House was probably out of the country for a lot of Halloweens, and not where people celebrated and it wouldn't have been a top priority for his Dad anyway. You may have a point about the childish games and pranks he plays, he does seem to rebel against his father's rules, even in adulthood.

Thanks for keeping reading, I'm afraid it doesn't really get less painful from here but at least there is a happy(ish) ending :)