I think the administration at a high school needs to give the students asked to give speeches the principal’s prepared speech: that is, a rough draft of what will be said if any student speaker gets the hook because he decided that he can say anything he wants because they’re not going to take his diploma away.
"Thank you, Mr./Ms. [name]. I unfortunately need to read a statement that was furnished to Mr./Ms. Name before he/she agreed to give today’s address. It reads like this:
Mr/Ms [name], you have rightly been named among the finest scholars our school has produced. It is unfortunate that you chose to disrupt our ceremonies as you did today. We talked in advance about respecting both your goals and ours for this gathering before you agreed to be today’s speaker. I wish I did not have to chide our finest scholar on his graduation day, but on behalf of those you offended, I must again repeat the principle you were taught, which is this: Not even the greatest achievement entitles an accomplished person to be deliberately rude to others. We are still very proud of your accomplishments here as a scholar. We have no doubt you will make fine contributions to our world. We also have no doubt that you are capable of learning from this experience and doing a better job in the future of balancing your objectives with the legitimate objectives and goals of others. Now, on to our next speaker…"
In other words, let him know that if he gets that bullhorn he brought along as a “prop” anywhere near his mouth, that (a) he was going to be given the hook and (b) he was going to be given a lesson on arrogance in front of everyone because of his deliberate choice to rudely spurn the agreed-upon boundaries.
As for what was or wasn’t in the speech? It is the school’s ceremony. They have the right to make the boundaries, and they do not owe anyone an explanation for that. They owe the speaker an opportunity to be absolutely certain his speech is acceptable and the right to choose not to speak. That is all.
