I can understand that the woman might be frustrated, the noise the child makes IS probably very annoying, and we don't know what time of day he is out of the house - is it early in the morning, late at night?
Of course, the kid has the right to play in his own front yard, but the neighbors also have the right to expect peace and quiet, and if they are not getting it, then they have every right to be angry.
However, writing such a nasty letter to the mother of this child is completely over the top. The woman could have simply knocked on the door and discussed things with the parent of the child, instead of resorting to what looks like a threat to me.
Of course, the kid has the right to play in his own front yard, but the neighbors also have the right to expect peace and quiet, and if they are not getting it, then they have every right to be angry.
However, writing such a nasty letter to the mother of this child is completely over the top. The woman could have simply knocked on the door and discussed things with the parent of the child, instead of resorting to what looks like a threat to me.