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Sometimes we use question tags with imperatives (invitations, orders), but
the sentence remains an imperative and does not require a direct answer. We use
won �t for invitations. We use can, can �t, will, would for orders.
I think the expected answer determines whether will you or won �t you is used with number 1. If the speaker is confident that the answer will be �Yes, of course �, then �Won �t you � is used. If the speaker is unsure of the reply, then �Will you � is appropriate.
With the negative imperative, only �will � is grammatically accurate, but I would agree with Carla that it �s a very odd sentence and I wouldn �t use a tag question at all.
In the first, I think you would find that native speakers would use will you or won �t you (if they use a tag question at all). They would do this for the reason that Ballycastle1 stated. Actually, I hear people say watch out for the dog, won �t you.
I think the second is less odd: Don�t look at me like that, will you? I think I �ve heard people say this many times when they are getting an unusual look/stare from someone.
According to my grammar book basically will you / won �t you / would you/ can you / can �t you are used with imperatives and will you is theoretically the only grammatically correct option for negative imperative. But I think it is different in practice ... because English doesn �t always follow the rules and it may be different in different countries