I wish it did! It is wonderful to see people who stand up for their ideas, who state their preferences with no fear and give valid arguments. Unfortunately not many do so. Why not say what's on your mind? It's a free world!
If one can 辩论 over various aspects of a TV-show it means that TV-show is very successful.
A little. We're obviously not going to all agree on the same stuff so a bit of 辩论 is natural. But there are certain picks with some touchey subjects though that I've personally made an effort to avoid because they're likely to get a bit heated.