Not sure an internet lynch mob is warranted.
Do we know who drew the "office" characters, and if so, whether they intended to retain the copyright?
WittyComics.com does have some characters that are a lot like the ones in SC's office set. Obviously this iPhone comic was made using SC, but the characters could have been WC's first. Even if they weren't, the artist may have intended for them to be public domain, or otherwise reusable.
As for the template, I'm skeptical that Brad/SC could assert copyright over a certain way of arranging backgrounds and characters to look like a comic strip. And even if he could, he probably doesn't want to: wasn't the whole point of making the renderer so that people could display their comics elsewhere?
It would have been nice if the author had taken the opportunity to drive a little traffic to SC, but I don't see a serious transgression here.
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The what mentioned above is total fiction. Please don't take it seriously!