It really does suck. I would hook my parents up with a Roku, which they would really enjoy since they have cable so they would have access to all the cable apps. But I don't because I know they would not like having to constantly sign in. There is nothing worse than getting into bed to watch something and finding out that you have to write down a code and then go downstairs to your computer and go to a website to enter that code and then enter login information, then hope it works before climbing the stairs again.
It's a stupid system, and the fact that the apps randomly log you out without rhyme or reason makes it worse.