So I doubt you were on a "black list" Im pretty sure they just didnt care.
There was a young tech here back in February. He added in his call notes something like "customer is using equipment in a manner which it is not designed." This wasn't even a Dish person, but a dealer...
The "leaving it off" thing while a bit exaggerated actually has basis in truth. It is definitely recommended to atleast power down your receiver every now and again. Though for a minimum of 1 minute (for a full power down). Anything beyond that is over kill and makes no difference unless your wanting to let it cool off.
Theres a reason why front line CSR's always ask if you have powered it down recently, and thats because habitual powering down of Receivers can extend there lifetime greatly.
I always have the inactivity time set at 4 hours for standby. Occasionally, I have had something recording where it didn't do its 3:00am shutdown. Maybe even two days in a row a couple of times. It still goes into standby. I was told that going into standby wasn't the same as turning it off. I had 722 for nearly 4 years. The only time it was turned off was when I was moving the receiver for some reason (new TV stand, for example.)
Some comedy - with the third 922, I had turned it off when I went to be around Midnight. Update was scheduled for 3:00am. I had a movie scheduled to record from 5:00am - 7:00am. Later, there was a CMT show scheduled to record from 10:00am - 12:30pm. I don't always fire up my TV when I get up. I turned it on around 10:30am. Then I noticed that the CMT event wasn't recording. The timer had started, but the recording hadn't. While looking around, I noticed the movie was showing 5 instances. Yes, the receiver had rebooted five times during the movie. Interestingly enough, the movie was "Going Ape!"
ERT rep told me that my receiver would not reboot that many times, even though it showed STB reboot (Set Top Box) in the Daily Schedule for the movie. He said that the receiver wouldn't do that, and that I was looking at something wrong AND I had, obviously, not turned the receiver off as I thought that I had.
I guess what amazes me, is the they assume that I'm totally clueless. I've been in the IT world for over 30 years. I've worked in CSR role. I've worked in support for Fortune 500 companies. I've done system admin work for over 15 years. I've done a variety of programming. I can even set the time on most VCR's!