All three of these situations occurred this past Shabbos and Sunday.
1) The loud Shomoneh Esrai davener.
A father of a guest davened a really loud silent Shomoneh Esrai. My friend moved his seat during every Shomoneh Esrai after Shacharis. I tried to wait him out by davening very slowly. I remember asking a Rav about this in the past and he suggested not saying anything as it would make the person very self-conscious when they davened.
Anybody have any suggestions on how to handle this?
2) The potential Art Scroll Offense.
There was an Auf Ruf on Shabbos and I gave the non-observant grandfather an Art Scroll Chumash for the leining. A friend mention that he seemed to be unable to find the place in his all Hebrew Siddur for Hallel so I went to get an English Art Scroll. Just as I was about to go over to hand it to him, he seemed to be davening with no problem out of the all-Hebrew Siddur so I refrained from giving it to him to avoid potential embarrassment.
How have other people handled this situation? Should one risk embarrassing the potential recipient?
3) During one of the Kaddishes on Sunday Rosh Chodesh Chanukah the Baal Tefillah was about to say the wrong Kaddish before Mussaf. Many people loudly stopped him in his tracks. This is a time-is-of-the-essence mistake.
Is there a less embarrassing way to correct the Baal Tefillah?