What reasons does Atticus give for the children not to play the Boo Radley game? Do you think he is right? Why?

Reasons, from the text:

“Son,” he said to Jem, “I’m going to tell you something and tell you one time: stop tormenting that man. That goes for the other two of you.”

What Mr. Radley did was his own business. If he wanted to come out, he would. If he wanted to stay inside his own house he had the right to stay inside free from the attentions of inquisitive children, which was a mild term for the likes of us. How would we like it if Atticus barged in on us without knocking, when we were in our rooms at night? We were, in effect, doing the same thing to Mr. Radley. What Mr. Radley did might seem peculiar to us, but it did not seem peculiar to him. Furthermore, had it never occurred to us that the civil way to communicate with another being was by the front door instead of a side window? Lastly, we were to stay away from that house until we were invited there, we were not to play an asinine game he had seen us playing or make fun of anybody on this street or in this town.

Atticus is completely in the right. Making up a game based upon the rumors about another person is completely wrong. First, you are having fun at the other person's expense; second, you are fueling the rumors and keeping them alive; third, behaving in a way that is hurtful to others in NEVER the right way to behave.