Keep in mind that when you say "not a single coach"...it's actually a single coach that travels with the cheer team. It's the coach, the mascot, and either 6 or 8 cheerleaders (don't remember what it's at these days road games). My guess is whatever administrators were there (again, a relatively skeleton crew for road games) were watching the tribute and/or not noticing the cheerleaders waving the flags while the lights are out.
I call BS on the statement of "BTW- every school has staff that learns the home teams traditions and tributes as well as if there is any other ad hoc events that will happen during a game and what the etiquette is...". Teams may send the opposing school a copy of the game Production Guide that will list out 50 pages of stuff happening before, during, and after the game. But who on the staff is "learning the home traditions, tributes", etc?
And yep, I read it again and again on the PSU board about how Ohio St did something to disrespect us, and " OSU doesn't give a **** enough to care. Where as- if we did it to them, even if they didn't say something- our Penn State fans, administration, coaches, etc most likely would have cringed on the spot and recognize we did something we shouldn't have, and would have reached out without anyone having to tell us to do so..."
Sucks that it happened. Obviously wasn't an intentional slight.