Of course, the subtitle of my title should probably be "Do you avoid spoilers?", because a lot of TV fans actually like them.
There was a time when there were no spoilers for TV shows. None at all. In the 60s and 70s and 80s and early 90s, there was no internet to speak of, and the gossip magazines and gossip TV shows really didn't go to any great lengths to find out what was going to happen on a season finale or a particular episode. Of course, it's a chicken or egg thing now. The shows are doing cliffhangers all the time (even sitcoms) and actually like to cultivate spoilers to hype the show (there was a time when a TV show's season just ended with a regular episode, nothing shocking or cliffhanger-ish). Cliffhangers really took off with the famous "Who Shot J.R." episode of Dallas.*