Short answer: No and yes. Long answer: Yes, no, maybe, technically yes, technically no, depends on your country, depends on what ruling you reference, depends on what circumstances, depends on what legal scholars you believe.
WHICH IS WHY I KEEP SAYING THAT THE LAWS HAVE NOT CAUGHT UP TO THE TECHNOLOGY YET @crazyqx83 !!!
It is not illegal: as of now, no, it is not illegal to stream copyrighted content, as per a ruling in the CJEU in Europe. This is based on the "fact" that is a "temporary copy" and not reproducible/redistributable by you, the end viewer.
It is illegal: Great: except for that it's clearly reproducible in the fact that you can watch it over and over at any time, really. Ok, so it's not illegal for the end viewer, but IS illegal for whoever is hosting the content. Where do you draw your philosophical/moral line? You can be prosecuted for receiving stolen goods, but not for a "stolen" tv show? Or is it a different animal altogether? WHAT ARE THESE LAWS??
It is not illegal: You will never be targeted as the end viewer. The logistics and man hours to snag you are completely not worth the time of law enforcement, or even the MPAA. This despite the fact that you probably know, objectively, that you are stealing pay TV. Not a problem in the eyes of the law!
It is illegal: it IS illegal to share passwords! Why? No one knows! That's just the first bit of legislation that got through. So as of now, it is not explicitly illegal for me to buy a little Kodi and stream ESPN to my heart's content. It IS explicitly illegal to us my brother's login to watch ESPN. WHY? NONE OF THIS MAKES SENSE!!!
Bottom line: We are in the wild wild west people, and I don't mean that Will Smith movie. The forces that be are gathering to make streaming illegal. How successful will they be when the technology is already out there? Laws contradict each other in both letter and philosophy, and are barely enforced. We're in limbo while the lawmakers try to understand wtf is going on. DO WHAT YOU SEE FIT AND WHAT YOU'RE COMFORTABLE WITH. I don't see TV shows getting crappier and crappier, in fact, they just get better and better, the cable companies (who have us by the balls with internet service) get richer and richer, even while a sizeable portion cuts the cord. Oh no ESPN had to trim the fat. Let me play them the world's smallest violin...
Whats next?: no one knows. My guess is we'll end up with a spotify solution: pay a monthly ransom to TV/MPAA and they'll help provide the architecture and turn a blind eye to DIYers. Content will be everywhere, hosted by anyone who cares to host it. 20th century copyright rules will begin to crumble.
As for now, we can stop this whole "YOU'RE STEALING, NO YOU'RE STEALING" crap. It is clear that no lawmakers can come to a consensus on what is or what isn't.