FWIW... I bowed out of the discussions after my stay this summer, but I'll briefly tiptoe back in on this one to offer my personal experience in hopes of tampering the hyperbole.
I do not like the policy. I had a number of concerns about it, first and foremost being that as a woman traveling alone, I take great care to stay safe and this seemed like it might make that more difficult. But I got a great rate at CSR and decided to see for myself how it worked. I happened to be traveling with my teenage son, and we discussed the policy ahead of time. My son sleeps late and I often go to a pool or to work out while he sleeps in, so I stressed to him that he was under no obligation to let a stranger into the room if he felt at all uncomfortable; all he need do if someone knocked was to ask "Who is it?" and say "This isn't a good time - please come back later" if he wasn't comfortable letting them in.
Two days we had a CM knock for a security check. Day 1, I was out and my son answered the door - he said he asked who was there, the CM explained who he was and why he was there, while my son looked through the peephole. My son felt safe, so he opened the door, walked out, and stood with the door open while the male CM quickly walked in as far as the bathroom, and back out, thanking my son as he left. My son then closed the door and replaced the flip-lock and I knocked to be let in when I returned later. Day 2, I happened to be in the room when a CM knocked, so I answered, did the same as my son had the day before, asked my son if he minded the intrusion, since he was still in bed, he said it was fine, and I held the door open while the CM did the walk-through. I left after that and my son engaged the flip-lock, and let me in when I knocked later.
I still think the security check is weird, and I still don't like it. But in full honesty, it was fine. It really was. I never felt intruded upon, the CMs were polite and professional, and nothing went wrong. That said, had I not felt safe, I simply would not have disengaged the flip-lock and opened the door. Just like at home. Nowhere have I seen anyone say a CM forced their way in through a locked door, and I very much doubt I ever will. I know it's not always easy to use the flip-lock due to people coming and going, but my son and I have always done so, long before this new policy, and I promise - it's not that difficult.
I applaud any efforts to get an "official" explanation about how the policy works, but I won't hold my breath. It honestly is a choice at this point: stay onsite and know this is something they do, or stay offsite if you truly can't handle the idea. I'm staying offsite for the foreseeable future, but only because it's cheaper - I wouldn't hesitate to stay onsite again if the cost was better than offsite because the security check wound up being far less of an issue than I thought it would be.