The real problem is that, while those of us who participate know the subtle differences, the sites look and feel much like a forum to most new visitors.
So these users are used to participating in other forums where this is not only normal, but borderline expected.
Now, I don't know a way to help with this. As we've all said before, people don't read. Despite the fact that these new users have an immediate huge bar at the top that explicitly tells them to read the FAQ, I'm going to step out on a limb and assume that none of the ones in that thread have.
So what can we do? Flag for mod attention? Probably not a bad idea, but that's a lot of flags to use up, and we only have so many in a given day. (Chances are an SU mod will see this post and do the right thing, though. I hope.)
Leave comments? I've found that politely worded comments do seem to sink in a little bit for some new users; others have a hard time with them. Probably goes back to the original point -- people don't read.
By design these sites are meant to be as frictionless as possible to new users, so putting roadblocks in the way is not only against the core values, but still falls back to the original point -- it's not like they're going to read them anyway.
Probably the best way to handle this sort of thing is to flag the question itself for mod attention, calling out the "me too" answers. Hopefully the mod will e-mail the users directly and let them know why their posts were deleted, and what the differences are between the Trilogy and "normal" forums.
I just did precisely that -- flagged the question with info about why.