I think the reason you don't see many such reports is because for one thing it usually takes many years for the damage to become apparent, and by the time it does people just assume it's out of any warranty that might have existed. It is not something you are going to notice in the first year, maybe not in the first five or ten years. And by ten years a lot of people will have sold their houses and moved on, and it becomes the next owner's problem. Now if you happen to still own your home and are still a DN customer, and you actually call about it, maybe their poilcy is to send someone out to fix the roof but the original installer would most likely never know about that. A lot of people won't bother to complain and will either try to fix the problem themselves or will hire someone to do it. Also, shingled roofs do need re-shingling every several years so if someone is no longer a customer it's likely the dish will be removed and tossed, and the damage just shingled over, which may stop any developing leaks but won't fix any rot that has already occurred.This is what I tell people who worry about leakage. Dish puts up maybe 100,000 new dishes a year, if not more. Add in the number DTV setup. If they leaked so easily, we wouldn't be putting them on roofs anymore
Also if someone says, "I installed a dish on my roof twenty years ago and it's never leaked" my immediate response would be that yes, when it's your roof you are going to be extra careful to make it as waterproof as you possibly can. Unfortunately, there are installers (and I am not saying that anyone here is one of them) that would only take that level of care if it is their house, or possibly a good friend's or close relative's house. For anyone else, they do a fast and cheap job, and doing a job fast and cheap does not correlate with doing the best job of waterproofing you possibly can. There are people in every profession that tend to cut corners, and I think that is becoming even more common as older people with a good work ethic age reach retirement age. Ask just about anyone in any profession if they're ever seen poor quality work done by others in their field and you will probably get an earful. And the homeowner has no way of knowing who they are getting, the guy who really cares and treats every job as if he were doing it to his own home, or the guy who is hung over from a night on the town and just wants to get the job done fast and cheap.