Ok, I think I need to put my own input in this question. First I think the woule question of people are irresponsable thing is currently being aproached in the wrong but easiest way, that is by banning it all together. My opinion is that if you arent responsible enough you shouldnt be able to buy a hamster let alone something like a pacu. I think a good way to deal with this would be for people having to take something like a corse in the specific animal husbandry, with a certificate given and that certificate present in the moment of purchase. Also I think that for big species and this in my opinion starts in medium dogs people should be needed to have a small inspection of their facilities, nothing big, just to make shure the space is available. Of course this would be something dificult to implement. Also I think pet stores should not carry many of the animals they normally have unless they were breeders as well. Many animals should only be obtainable true speciality sources like breeders, importers and zoos (and yes, zoos should defenetly open to the private sector, they are here in Europe and both parts greatly benefict from it). AND pet shop dealers in order for their bussigness to be allowed to open should need to have a complete animal husbandry degree (most here are complete knucle heads).
Of course this would create a huge wave of protests amoung pet shop owners, many purchases would really drop, but hey we would make a really good step up in animal well being. Pacus are easily bred in zoos, however they are not in most domestic tanks, so the problem of them being present in the wrong hands wille still being available to the good guys would easily be solved.
Now komodos, I think if we can implement one day something like this, komodos would easily fit in. Dont forget THERE ARE komodos kept privatly in Europe and in South East Asia as well and you dont hear on the news people being eaten by captive ones! As for dangerous animals I really think that Great Britain sistem for the ownership of dangerous wild animals its one of the better one. THERE ARE GUYS WITH TIGERS, LIONS, RHINOS and BEARS IN THERE, all animals much more dangerous then komodos. I mean a 2m high plexiglass fence without any holding points contains a komodo. And for a species so endangered that could be a really good step foard in their long term conservation. And of course, no, under no circunstances should this species be kept privatly without any permit, inspection and training sistem. And that should go as well for all big boids, varanids, crocs, etc... That would make so much more sence then banning species, that is the wrong easy way out.
In a very resumed awnser, I think the woule pet world needs to implement a new sistem that allows the ownership to the rigth people wille at the same time avoiding irresponsable ones from having acess to the animals. At the moment if you ask me some people should not had acess to many animals currently kept. But once this change takes place, it doesant really matter, you can keep practicly all if you work for it and have the means.
). Another thing it is KOMODO NOT KOMOTO. 
