That’s a good guess, but when I first saw the story, I was puzzled by the fact that the student threatened to kill and rape the teacher (and it’s a fair bet that the teacher was not a proud woman of color, in fact I bet she had no color whatsoever), and he said he wanted the ENTIRE class to get A++. First of all, there is no such grade as an A++, and so he wasn’t one too bright, and secondly, I suspect he wanted the ENTIRE class to get the A++++ because he was looking out for his posse, yo, his boyz (and ho’s)
Personally I think he is so computer illiterate he thought if he asked for an A for the whole class they wouldn't know which kid did the threat, not knowing email addresses are the easiest thing in the world to track down and pin point who is the holder of the account.