It is about time ALl referees wore mics and cameras, any abuse in any shape way or form report to the FA (immediate world wide / life time ban) inform other sport bodies so the ban extends to other sports.
Police prosecute, life time criminal record, addition to adult barred list (life) and if a junior coach add to child barred list too.
Empoloyer able to sack said person immediatly with zero come back.
Perhaps then, and only then will the consequences be strong enough to make people THINK TWICE. Safeguarding is essential, lets start by ridding ourselves of bad coaches. If the offense is by a parent, then they should be subject to the same sanctions as so they can't every coach, in fact if they are that abusive, take their kids away.
The harsher the penalty, and as long as it is enforced with a rod of iron, it may actually make a difference.