This episode shows the audience how determined Lisa is to do what she thinks is right. She's upset that Homer is spending all the time in front of the TV anyway, but she's even more upset with the fact that he's illegally being hooked up to it. For the entire episode, Lisa refuses to watch the TV and tries to steer everyone else away from it. Not only that, but she also tries to get her family to not steal anything at all.
This episode isn't exactly hilarious, but it has a good message hidden in there somewhere. It had it's share of moments, like when Homer's body basically gets impanted into the couch and when everyone is coming to the Simpson's house to see the big wrestling match. As I've said, it's not really a funny episode, but it develops Lisa and shows everyone that she is determined to do anything to get people on the right path, and that Homer couldn't care less about what he's doing is wrong if he makes himself happy. Not the best episode, but it's a pretty good one.