OK. I just got off the phone with a so called senior tech. This was one of the most mind boggling conversations I have ever had. This clown kept on telling me gibberish (I can't begin to give the details, but this was mind blowing) until I finally got him to admit that he had no idea what crsud was or how it worked and Apple had told him nothing. The killer was at the end when he told me that if I were to delete any of the .plists associated with crsud, they would automatically be recreated. This buffoon didn't know the difference between an ordinary preference file and a LaunchDaemon property list. This was a senior tech. Maybe it was just my bad luck to fall on this moron. Perhaps someone else wouldn't have tried to pretend they knew something they didn't.
Anyway, I got him to write down the paths of the locations of all the crsud files, including the executable, and he said he would ask engineering and get back to me. Bottom line, I asked him to make sure he finds out if this installs updates silently. (Based on knowing absolutely nothing, which he admitted, he assured me it didn't.)
I think the next step is for anyone reading this thread who may be concerned, to submit a request for some proper documentation about this. Right now there is absolutely zilch and the techs have nothing. I'm not exactly holding my breath for a useful answer--or an answer of any kind.
https://ssl.apple.com/support/feedback/