Jewish Thinker:
. . . but when someone is going to have to redo his entire shemona esrei because he forgot yalleh vyavo and the only way to make sure it doesn’t happen is to say it out loud, it is the correct time to do it.
I strongly disagree. You’re interrupting the davening of the majority for the needs of a few individuals. If they were paying attention to their davening they wouldn’t forget the extras and changes in any amidah. It’s not your responsibility to do the reminding unless you’re the gabbai, and if you’re the gabbai, you’d find a way to remind people without creating a disturbance.