Can animals attack or kill people even if unprovoked?

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Sorry, but if you invite me to your home and I completely ignore your dog and it comes up and bites me for no reason it's getting my boot in it's face 2 seconds later.

Who's dog does that? And you should boot the OWNER of it in the face, not the dog... unless you have to in order to get loose.

If you tell me beforehand to be careful of doing certain things I will respect the dogs boundaries.

See, its not that hard! Even Opie can do it!

End of the day you are responsible as the owner for the dogs behaviour and if it can't behave around other people it should be kept away from them.

So long as you follow your previous statement, I agree.

If I go to someones home and they have a dog I ignore it, if the dog approaches me I will always ask "is it okay to pet the dog?" before touching it.

Good call. Though I usually am able to pet dogs that most people can't. I've had many dogs lay in my lap and be big baby's and their owner's say, "I can't believe it, he normally hates everyone!" Dogs have an extra sense about people too, and a normally docile dog may attack someone simply because they sense that someone means evil. And vice versa.
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