understanding the facts...

As far as the pit bull situation, I found this informative. It was posted by Chicago's veterinary association in response to their city's attempt to create breed specific legislation.
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Frequently asked questions concerning the ban:

1) Are pit bulls really the most likely breed to bite?


The Center for Disease Control has reviewed national bite statistics and concludes from this data, no specific dog can be labeled the most aggressive, therefore statistics used to support breed bans are inappropriate. http://www.cdc.gov/ncipc/duip/biteprevention.htm


2) I want to protect my child no matter what, how can you say that banning pit bulls won’t prevent future attacks?


Because all types of dogs can inflict injury, bans do not diminish violence. The bite statistics of individual cities that have banned pit bulls, such as Winnipeg, which has for 14 years, are not reduced, only changed in breed to German Shepherds and Rottweilers. CVMA wants to see legislation that will protect the public for years to come. http://www.doglegislationcouncilcanada.orgstatistics.html


3) Won’t this help reduce gang-related activities and even spare pit bulls from the abuse they suffer in related pit bull fighting circles?


The population that is responsible for breeding and training the aggressive pit bulls is underground. These criminals will simply go further underground or switch breeds to continue their elicit activity.


4) Why isn’t the simplest solution to all the recent pit bull attacks a breed ban?


Imposing a breed ban is extremely difficult for: 1) Identifying and differentiating from similar breeds/mixes; 2) High cost of support staff to uphold ban; 3) Loss of revenue to city from relocation of families refusing to relinquish pit bulls; 4) Creating an overwhelming burden on local shelters and neighboring cities to handle relinquished pit bulls. Some cities, such as Cincinnati, have even revoked their pit bull bans.


5) What is an alternative solution for breed bans?


Education on socialization, bite prevention, pet selection and pet responsibility are long-term reasonable solutions to enhance public safety. Stronger enforceable non-breed-specific dangerous dog laws, as well as leash laws, are also very important.
http://www.avma.org/pubhlth/dogbite/dogbite.pdf
http://www.avma.org/policies/poldangr.asp
http://www.akc.org/canine_legislation/position_statements.cfm#dangerousdog