> Callahad agrees with you that "force pushing" the add-on was a terrible, terrible idea.
That aren't Callahad's words. Here I quote him exactly:
"Looking Glass is a really cool idea for users who want it. But pushing it out broadly, even in an inert state, was not good."
Note, not even "bad." Just "not good." And far from "terrible, terrible."
In the part you quoted they were just pointing out that an optional extension is the correct place to implement this sort of thing. I am sure that if they had just posted this as a separate extension from day one then the target audience of Mr Robot fans would have had fun with the ARG and everyone else would be totally unnafected.