Hmm. Perja, most kittens are going to play with wires or cables for a while, until they mature. It's just part of that playful stage.
Re: adoption of purebreds. I disagree that it would be easy to find a purebred at a shelter for the simple reason that most contracts (I signed one) have a clause within them that forces you to promise to return the cat to its original cattery if you need to give the cat up for any reason. Reputable breeders do not want to see their cats end up at the SPCA --ever. And this is policy at all of the major cat fancier organizations, of which all reputable breeders are members.
Purebreds do get given away through specific rescue sites just for that breed, though. Most breeds have one site, with listings. It's often very hard to adopt these cats -- there's a lot of demand and it still often isn't free.
Also, it has become quite costly to adopt a cat from the Humane Society! Anyone notice?