I’m not being obtuse- I went to the graduation and nobody printed or posted behaviour rules, nobody had air horns, everybody clapped and cheered, and we got out of there in about 90 minutes including three musical numbers, salutatorian and valedictorian, principal, and superintendent speeches. Also nobody got reprimanded for excess vigor.
Please explain why that’s so wrong.
LOL, you think everyone behaves that way?
Heck there are WOMEN in this country (though maybe not where YOU live) who would beat you unconscious if you asked them to be quiet so YOU could enjoy the ceremony.
Grow up.