I went to my buddy's family's gathering for Thanksgiving one time, he is Trinidadian (I am Canadian), the hosts would just put things on my plate without even asking if I like that thing or if I'm allergic to that thing, even when I explicitly said "No thank you I'm stuffed" they'd just plop it onto my plate anyway.  So infuriating and so many levels of WTF, and I'm the one that would be considered rude for not accepting?