With Stolen Technology from Tivo. Which the lawsuit proved correct.
If you really want to get into an ethical discussion, I suggest doing some reading at the Free Software Foundation, or the Electronic Freedom Foundation. Software patents are patently ridiculous. There are many people who believe that it is a moral requirement to violate as many software patents as possible, to bring the system crashing down on itself.
Dish tried to create their own DVR software that they thought would be different enough to pass muster. The courts disagreed, but that's why they have courts to begin with. There is no evidence that Dish took Tivo code and used it without permission.
I'm not going to argue that Dish is an ethical corporation. There is no such thing. Corporations are not people, no matter what the Supreme Court says. People do unethical things all the time, and some of them do them while running a business or working for a business. I have no reason to believe that the people who run or work at Dish are any more unethical than those who work at DirecTV or the local cable company.
But all this runs far afield from the discussion of whether Dish is a good place to work or not. I am grateful to live in a country where people get to choose who they work for, and negotiate their compensation accordingly. When Dish can no longer get employees to perform the necessary tasks of running the company, their particular business model will be found wanting by the court of public opinion and thus die off. Until that happens, the opinions of people who used to work there count for little.