Hey, my dog barks and growls (not really growls..) when ppl come to the door, i think its just being protective. I also believe when dogs look you in the eyes(like staring and not looking away) they think there more dominite then you, or something along those lines lol, could be wrong. I would try to fermly tell your dog no, and have her sit and or lie down when people are coming over (when they knock) have her stay there, until the person has come in or whatever. Do you get the person to talk really gentially (i dont know if them not lookin her in the eye works with dogs, i think it does with horse tho! LOL) and put there hand out, in the fist (low so she doesn't think they want to hit her) and just wait for her to come in smell so she knows that this "intuder" doesn't want to hurt anyone in her family or whatever she thinks..This worked for my dog but i duno if i know what i'm talking about lol, I think she just thinks "men" are..mm i duno, my dog seems to only bark at men when i walk her (she doesn't usually bark at anyone when i'm there, on lead anyway) Maybe there deeper voices intemidates them. Does she do this to white men also? like all men in general? don't think dogs would know the diff between white and black ppl would they? i'm sure carrie will be along sometime, or someone who knows a lot more about it them me. Might work for you too, hope someone more experianced comes along to help you :] goodluck