Scoring should not be made public during the event.
Announcing or posting scores does nothing to enhance the event. The only thing it provides for is negative feels.
"You know, I only need a 5-5 draw to win the event."
"We're friends and you already won a bye so let me win to get my bye."
"Let's 5-5 draw to lock in our 1st and 2nd place."
The only reason to keep scores public is to provide opportunity to collude. Sure, a player could try and figure out the scores by asking around, but if it was generally agreed to be poor etiquette people wouldn't do it.
part of me agrees but at that point the TO/EO should not be participating in the event as they will clearly know all the scores and others won't.
At regionals/Nationals/Worlds you shouldn't know but honestly its not hard to figure it out or have a very good idea. I have not intentionally drew out a game. I have however intentionally delayed engagement knowing that the less time my opponent has to damage me the greater the chances of me walking away with 1st place. Some may say that's unsportsmanlike, but others will say its tactically smart to play to your advantages and the disadvantages of your opponents.