In general, you can assume that the good movie scale reflects how much we enjoyed the movie, independent of the points that we heckle in the Bad Movie Scale. The Bad Movie Scale takes a little explaining. A 10 means the movie was horrible but had enough badly-written substance to be hysterically funny. The acting, the dialogue, the special effects, and the brilliant plot twists leave many possibilities for one-liner heckling from the obnoxious theater viewer. A 5 or 6 is a movie that wasn't bad enough to be funny.
Most movies tend to be mediocre like that.
A 0 or 1 means simply that the movie simply wasn't funny in the bad sense. Basically, we provide both scales to give both types of movie watchers some guidance. The movies to stay away from are those that have low numbers in both scales. You find yourself alternating between checking your watch and keeping both hands on your skull to keep it from exploding. At the end of the movie, the audience stampedes for the doors.