Well, my 2-cent is that you can laugth of everything but not with everybody... So defying the norms with Easter Eggs sent to the wild can be an issue. You have to know your audience to properly chose your level of impertinence.
I completely agree with the first sentence - however I would argue that normal, level-headed and sane person either laughs or just shrugs and moves on if that particular joke is not to their taste.