I tried following your arguments, but failed.
The woman in question flashed CM11 and (official, unchanged, albeit unsupported/in a grey area if you grab them yourself?) GApps. G+ etc. is part of that and as far as I can tell and that is what the person in question states in the discussion you link.
How do you know that 'The ROM'(?) 'skipped all disclaimer and notice about which identity will be used'? The Twitter link at least doesn't say that at all.
Obviously you might have a point, but you didn't present it well/the facts given don't match what you claim to know.
That screenshot doesn't seem to indicate to me that any change to any outgoing identity is to happen. The only thing it tells me is that I can use Hangouts to send SMS.
I haven't used android in a while, so you still might very well be right, but the screenshot you've posted as an example doesn't tell us anything.
Once SMS is turned on you get a message on top of the screen informing you what identity will be used, can't seem to find a screen shot of that (probably since people don ' way to publicise that info).
You appear to be extrapolationg your experience of an OS on a device with a bunch of accounts to her experience of a differently installed OS on a different device with different accounts. Then you appear to be saying that she is wrong and that it's her fault.
Part of the problem is the lousy quality of journalism. From reading TFA we can't know what actually happened. But if you know what happens on simillarly installed OSs and accounts it'd be great if you could present a clear wallthrough.
At the moment you seem to be making irrelevant points.
It's certainly not Google's fault, either, if someone flashes a third party "mod" ROM to their device that may or may not have had disclaimers and EULAs removed, any more than it's Adobe's fault that I didn't see a claus in the EULA claiming my firstborn because I didn't buy Photoshop but instead pirated it, and the pirates replaced the EULA with an ad for their 0-day warez site.
How do you know that 'The ROM'(?) 'skipped all disclaimer and notice about which identity will be used'? The Twitter link at least doesn't say that at all.
Obviously you might have a point, but you didn't present it well/the facts given don't match what you claim to know.