Why doesn't Wincustomize do at least a minimal amount of quality control on WB Skins?
At least 4 of the 15 most recently uploaded skins were basically unusable in their original incarnations. Many, many skins have fatal flaws.
Since you are evaluating each skin to make sure it's not a rip, why don't you go ahead and install it and see if the installation works - it's surprising how often it doesn't. If it does, then go ahead and run a series of simple tests to make sure the skin works and is usable and legible. This shouldn't take more than a couple of minutes.
Hundreds of thousands (maybe millions) of unusable skins have been downloaded. Thats a lot of wasted time and bandwidth. It is also a poor reflection on Skin Studio. It's disappointing to download a beautiful skin and install it only to find out you can't use it.
Maybe you could create a list of people who are willing to beta test skins before they get uploaded. Then the skinners could get in touch with those people. In fact, you could restrict skins from being uploaded except by the beta testers.