About a year and a half ago, an executive at Disney-owned ABC-TV talked about how the network was experimenting with ways to block people from fast forwarding through commercials. The exec in question even claimed that commercial-skipping wasn't even a very important feature for most DVR-owners. Despite the widespread criticism of this statement, it appears that ABC is now preparing to test that theory. In association with cable company Cox, it's testing a new video-on-demand feature that...