Old Man With Aggressive Dog: I am not being ageist but:?

I have come across an elderly man today with a dangerously aggressive dog that he could barely control. I thought the dog was going to attack my dog. My dog is only nine months old and very friendly. I am not saying elderly people do not deserve to have dogs but what do you think about them having a breed that is too strong for them to handle? I know of an elderly women who is lovely and so is her dog - However she is in her seventies and her dog is well above her waist in height. She cannot walk it at the moment because it threw her over and she is bandaged up. It's not my place to say what dog a person should have but how do YOU feel about this?