That certainly makes sense. But hopefully, since he is in some sense a public figure, we rely on him to make sure the good done is in excess of any damage cause

That certainly makes sense. But hopefully, since he is in some sense a public figure, we rely on him to make sure the good done is in excess of any damage caused, since he would be censured if that were not the cases. For example, if he had got students to break into museums and make actual changes to historical documents with bleach and ink, he'd make the cons more believable but the harm would be too great. I don't think he did cross that line though. Some solutions if he did: what if he escrowed (and set a time to release) the pranks in case they aren't caught? What about donating to wikipedia, since it's their green they are mainly playing rugby on?