You don't actually watch the show on tv-links--they just provide you with links that host the video. As long as you're careful, and don't download anything, you should be okay...I use it for EVERYTHING. I don't have cable, because I'm hardly ever home, and I couldn't justify paying for it when I can watch it online (and now that I have a new tv, I can hook my laptop up to my tv with an HDMI cable)...
The links that I know for sure are typically trustworthy are any putlocker, sockshare, gorillavid or daclips link. allmyvideos.net links usually work too, but that's one of those sites that gives you limited time of watching before you either have to subscribe or wait XX amount of minutes before you watch again. But if you're only going to watch one episode and then go to class or something, they work 99% of the time. Just make sure when those open, you don't download the ilivid thing...let me take a few screen shots and show you how to get out of that, because it took me a while to figure it out and see how to get rid of it. haha