I just gotta come with some input here, I live in sweden where we do have regulations on what we may and may not keep, poisonous snakes included, to have a poisonous snake we have to get licenses etc, even some nonpoisonous snake, this isnt something expensive tho, just keeps you from impulsbuying an animal that do require hard work or atleast the awareness of the possibility you might get bit etc... when it comes to parrots, i dunno how it is in US but every bird we own that is CITE listed requires special documents, declaring it is not a wild captive, and with numbers so you can track parents backwards etc. (that is about as much regulations we have on what birds we may own... overall) the only birds that we may not have is native birds for some reason, well native to europe, the rest of the world is fine... dont know why it is like this but for some reason it is. and in holland birds that we have native here in sweden has been bred in captivity for generations, but we cant get one of them... weird but still... thouse birds we keep outside and feed em in the winter and watch them... then we got all regulations stating how we may keep our pets tho, minimumsizes of cages, weather you need more than 1 bird etc. you are allowed to have 1 bird... and the rule is kind of interpretable.. it ses that birds are to be kept in pairs or more... unless you can provide the time needed to become the birds partner...kinda not exactly but you get the point...
Our minimumrequirements of cagesizes.. well its teriffic.... sometimes, sometimes it seems abundant, the cagesizes is basicly the private area your bird has to have, so even if you dont keep the bird in a cage.. then you ned to have a specific room that is used for nothing except the bird... and the cagesizes varies from

that requires a minimumcage of 70cmX45cm and 60cm high (for thouse who doesnt use centimeter that is about 27.6"x17.7" and 23.6" high) the larger birds like a

requires a cage that is minimum 360cm X 180cm X 180cm (that is 142"x71"x71" witch should be if i know the weird measurements correctly 11'10"x5'11"x5'11")
I mean that macaw cage is a kidsize bedroom pretty much... While these regulations are put there in an attempt to create better lifes for our pets, it sometimes hinder people that would give the pet an extraordniary home just becouse they wouldnt be able to fit a cage fulfilling the requirements in their home... while birds neglected the socialtime outside their cages have it better in them than in smaller ones, but then I think the requirements should be even greater (wich they also have intended todo since they created another text declaring sizes of cages etc for animals in zoos, there are ALOT bigger.
About policing a community I think that is the best way to avoid to many written laws aroudn the subject, the intentions behind written laws might be good, sometimes... but once thee are written laws there is usually stuffs around them that makes it less good as well, lets say for example they stated a law that the minimumcagesize for a budgie was a shoebox... a lot of people would get a shoebox sized cage for the budgie they buy for their daughters 5th birthday or whatever, while if there is no regulations, they might actually get a somewhat proper cage for it... sometimes...
laws in all its glory... but their usually overdone and creates as many problems as solutions... But then, i grew up in "the safest country of the world" only with canada as a close runenrup
