What Coz did is not only fraudulent, but also a huge safety hazard. By continuing to support him only condones this behavior.
Yes, EVERYONE makes mistakes. This, however, was a calculated act to deceive his customers, while exposing 300degree to undeserved liability in the event of a fire. This wasn't a "goof" as TriniTT put it.
Where Coz "goofed" was that he didn't go the AMS route by copying them with a few cosmetic changes and then calling them his own.