Yes, many people don't like dogs, are uncomfortable in their presence, and would rather avoid being chased by an aggressive animal (that is in all likelihood feeling threatened/scared), but there are over 12 million dogs in the UK with 78,000 attacks recorded over the last five years (CH4) - so, less than 1% of dogs. Despite the right-wing press making an issue out of all of this, we have bigger problems to deal with (though I would support some form of mandatory owner training). And think of our poor American cousins - they have to deal with snakes, wolves, cougars, sharks, and the like.