are the ones who set the terrible precedent.
We have seen angry fans throw shit on the field in years past, but it never became 'the thing' to do became refs never fraudulently overturned a call after fans did that before.
This is not speaking to the correctness of the call, the initial PI call was terrible, in fact the more correct call would have been offensive PI on Georgia, so when they reversed the PI they actually got the call right....BUT you still can't do it, PI isn't reviewable and there's no way you'll convince me or anyone else who was watching that it wasn't "reviewed" on the jombotron during the delay caused by the fans throwing shit on the field.
Now it's a thing because everyone thinks if a call is bad enough, you just throw shit on the field and maybe they'll correct it like they did for Texas.