“When certain people insist on finishing shema out loud when the shaliach tzibbur has moved on to ve’emuna”
“Think that’s bad , what about when your(trying to) davening shmonei esrai & the guy is saying shma – OUT LOUD!”
I would be “dan l’kaf zchus” and assume they don’t realize. My mother told me recently that she had to wait until I finished bentching to bentch because I was bentching so loud. I had no idea I was bentching out loud.