Please change the Dangerous Dogs Act

When I started up my YouTube video about dangerous dogs, I got more interest than I thought I would, so I've decided to start a petition.
I think the Dangerous Dog Act 1991 should be changed, because I don't think it's effective. Just because a dog is a breed that is included in the act, doesn't mean that they are all aggressive. And, just because a dog isn't included in the act, doesn't mean there aren't dangerous members of the breed.
I think it's unfair and unethical that dogs that are pitbulls, for example, could be put down, even if they haven't attacked anyone, just because the law is against them.
I think more responsibility should be put on the owners, especially if they've been using them to fight, and that the breed ban should be lifted, in favour of better education for dog owners and children, so that they don't approach an unknown dog before they know they are safe.