Based on a few Reddit posts and anecdotal experiences from a few in the comment section that I have read so far, these people came here legally and the AOS petition was timely filed before the visa expiry, they are in an authorized stay (without legal status) and are getting detained at USCIS during their interview.
There are several reports about this in the local news media from San Diego and San Fransisco.
Any thoughts on this? So are we all going to agree that it was never about "legal immigration"?