Ford shouted out, "Hey listen! I think we've got enough problems of our own having you shooting at us, so if you could avoid laying your problems on us as well, I think we'd all find it easier to cope!"
(out of The hitchhiker's guide to the Galaxy, ch. 32)

I guess 'having you shooting at us' here means 'and we don't want you to shoot at us'.
Well, or 'we've got enough problems of our own and you're shooting at us - that's all we need!'

Am I right?