Come to think of it... after reading all of your opinions/views on this particular episode, I would like to partly conclude this forum by stating a couple key factors onto why this episode (if looked at a different way) is not formally portraying the message it wants to portray to their audience. First off like people have said above, the scene where the bully admits his flaw is not at all real. there is not one person on this planet who is a bully who willingly commits why he acts the way he does in front of his entire class. When Farkle told Riley, Maya, etc. that he was being bullied, (like the person above stated) Why isn't Farkle telling all of this to Cory?
The past episodes clearly show that Cory and Farkle have a strong student-teacher relationship going on. Plus the message of Harley bullying Cory when he was a kid and then ending up as a janitor was a really poor threat on what happens to you if you were a bully at school. If you learn from your mistakes there is no guarantee you'll end up with a comparatively bad occupation than the person you bullied. I think this shouldn't be focused upon but it still is a factor to bring up.
As my concluding point with explanation of course. I would like to make a statement which might seem so controversial but it's my opinion or way of looking at it. Lucas was the real bully in this episode. Like many others have said above Lucas was not Farkle's best friend. They both were true opposites yet the same if you see where i am getting at. But to make this not at all more long-winded, Farkle did not like Lucas at first and same with Lucas not liking Farkle. Also there is also some solid proof. When Billy openly said to Lucas, Maya, and Riley that Farkle is stupid and doesn't deserve friends etc. Lucas got so mad and cowardly pinned Billy to the wall due to his anger.
To me that really says something about Lucas' anger. If you see Billy did not use any kind of physical contact against Lucas or Farkle! Disney pulled a controversial move with this scene. I know that when someone of something you love is being hurt by someone else you tend to express your emotions physically, but this happening with Lucas especially is a bit surprising. To conclude, I would have to say even though this episode had a good message to choose kindness and stop bullying, there were a few minor-major mistakes made that, if looked at closely, can change someone's perspective which can lead you to missing the whole lesson/moral of the episode.