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Domesticated dogs of any breed are only as scary as they've been trained to be or mistreated and neglected to be. Most any dog can be trained to do what you want them to do and some are a little more 'intelligent' than others - just think about it, you can train some dogs to fetch your food for you, sniff out certain things, find missing people etc.! Even some neglected or mistreated dogs can be rehabilitated and re-trained. A dog that knows its boundaries and place will not even step paw into or out of an area you've deemed a no-go-zone nor display any inappropriate dog behaviour (such as nipping, excessive barking etc.). Most healthy, trained dogs that are properly cared for do not defecate/urinate in a home and some will even avoid doing so in a yard as they like to do their business away from their living space.... but, if all you do is leave a dog tied up in a yard, you can expect it to relieve itself there (has no other option); likewise, in home too.

All said and done, people have a different understanding of dogs (at least in North America) perhaps because there are so many controls here - laws and regulations, disease control (vaccinations and vet treatments), population control (spay/neuter), lack of street dogs (for the most part), variety of breeds, etc. etc. Compare that to other places that have little or lacking control and perhaps and over-abundance of street dogs (increased chance of rabies and other transmittable diseases) and a very different relationship emerges where a dog is seen as a nuisance, a source of potential disease, fear, etc.