You know?  There's another reason I feel that I was a bit too harsh on the CGI Thomas episode, "The Railcar and the Coaches", by comparing it to the "Arthur" episode, "Arthur's Big Hit", and that's that the former episode did the "two wrongs don't make a right" moral better than the latter episode.  Why?  Well, there are two things about it:

1) Annie and Clarabel simply chose voluntarily to retaliate against Daisy as opposed to Arthur whose patience had been repeatedly tested by D.W.'s constant antagonistic behavior.
2) Daisy not getting in any real trouble for her behavior was never a general show problem, unlike when Arthur got in trouble but D.W. didn't.

And you know what makes the general show problem in "Arthur" even worse?  It's the very fact that this sort of thing actually happens.  I know that I'm echoing PieGuy's opinion on the "iCarly" episode, "iMeet Fred", but the same applies here.  So don't go on using excuses like "that's how it happens in real life" because I reiterate, that's exactly the main problem.

Now, don't take this the wrong way; I'm not trying to censor bad things happening in television or in real life, because you simply can't censor what happens in real life (like most of those "moral guardians" seem to be doing).  Plus, we need conflict to make an interesting story.  It's just that some TV shows seem to condone that bad things happen to good people in real life, thus rubbing it into our faces.