I would say yes, but only if it was divvied into different bowls, (not actually 'sharing' the food because our utensils wouldn't be touching). I did the Kitchen sink about 10 yrs ago, with 7 of us, and I don't think we finished it. Looking back now I think - ick, we just ate of the bowl together and just rotated it! (we were just friends, not family). I guess I'm in the minority, but my DH and I always have a habit of meeting people and becoming friends.
If you ask someone, I would try to strike up a conversation first, and then mention it, but YOU mention divving it into different bowls.