This does look like a convenient item for branching a branch circuit. I also agree that its distribution should be limited to folks in the trade for the reasons mentioned by others, even though I'm a DIY'er myself. It would be WAY too easy for DIY'ers to seriously abuse/misuse the application of it.

While mentioning the do-it-yourselfer and the sometimes cavalier attitudes they have toward electricity, perhaps our codes need an addendum such as:

"When the AHJ fails an inspection of an installation performed by non-licensed personnel (i.e., DIY'ers), the AHJ shall require the largest chair in the residence of said person(s) to be cord-and-plug connected." [Linked Image]

No wire bias here- I'm standing on neutral ground.