Lawmakers and enforcement personnel look for the easiest way to cope which means the use of a number, a label, a color or a one size fits all mandate in order to reduce the need for critical thinking, fact finding and imagination. It is essentially stereotyping and profiling in the worst way. As expected they spend most of their time in court defending the indefensible - the fact - it is not a pit bull, and the principle - too broad to be constitutional. Think about this - man teaches dog to bite everyone. The dog does what he/she was taught. All dogs that look like that dog are banned!
Instead of discriminating be discerning. All dogs can bite. All dogs can be gentle. Any breed can be a genetic lemon, and any breed can be the best dog ever. Mean people who try to make their dogs vicious (all breeds) are the ones who should be prosecuted. And, legislators, enforcement personnel and insurance companies should be better than this.
Finally, the state of California prohibits breed specific legislation UNLESS it is to mandate that specific breeds must be spay or neutered. All of the above applies. It doesn't work and it doesn't address the issues of responsible pet ownership and pet overpopulation. It's a slower way to wipe out a specific breed.
In case you are wondering - spcaLA does adopt out pit bulls.
P.S. If you want to participate in a campaign to repeal the pit bull ban in Denver - here's how: link