I have come around to this opinion. Lots of schools have little quirks. Mississippi State clangs cowbells. Boise State has a blue field. Rushing the field on a regular basis (instead of remarkable situations) could be "our thing."
I sort of resisted the idea at first, cringing when the students rushed the field to celebrate a win over a team we have beaten 6 times in a row. But, I have noticed how the students wait around in much larger numbers when there is a field rush in the air.
Maxy brings up a great point though. Safety needs to be a factor. I saw another social media video of a mom in the hospital getting a cast on her broken leg after jumping over the wall for last Saturday's field rush. Somebody is eventually going to get hurt badly. I've done my last field rush but I found that it could be done safely by turning my back to the field and letting myself down belly-to-the-wall. But most people haven't done it enough to realize that and they face the field when they jump down and it is a loooooong way. There have been medical needs every time.
If there are "rules" around when it can be done (heck, even publish it in advance "hey gopher fans, we'd like to meet you on the field in the event of a win this saturday to celebrate" and it could be set up more safely for field rush games - I officially give up and will quit sighing when a field rush occurs after a win over not-so-epic opponent.