I would definitely be more concerned about getting bitten by a small dog. Lol. I grew up with Huskies and Bull Mastiffs, so in my mind, those scary dogs are just cuddly puppies. However, I have to say I saw much MUCH more aggression in the Huskies than I ever did in my Bull Mastiffs. The Huskies have a very strong hunting instinct and don't enjoy being anything less than dominant in the household. At least not most. We bred them, so we saw more of it maybe...but still. The only ones that were completely submissive to me and my family members were the ones born in my house. They had a very strong bond with the family, and we with them.
It's funny...the protection breeds are my favorite. I love their fiery personalities.But, since I am still a college student and feeding a Bull Mastiff can get expensive, I'll take it down a size or two and get an English Bulldog instead. I love Bullies. <3