Sideline warning, an observation...

I'm 100% convinced that this is the #1 broken rule in football. So much so that I'd speculate there isn't a single play run in youth football, HS football, college football, the NFL, in an entire year of football in which there is not a sideline infraction.

NO, before you go there , I'm NOT complaining or saying it should be called more often. I don't think that at all. Most of it is meaningless and if they flagged it every time you might as well end the sport of football completely.