DP is blind to the fact that some people may not want to hear someone else’s conversation or to be be heard while having a conversation.
I work away from home so use WhatsApp to call my partner every night while away. I’ve lost count of the number of times that I’ve done a video call and found out halfway through that her DM / DSis / Dfriend is in the room and they’ve been listening to the whole conversation, also, we were having an afternoon drink in a half full country pub recently when her brother called, she took the call, on speaker, and spent the next 5 minutes having a chat the whole room could hear, because she wasn’t holding the phone to her ear she was speaking louder, people were staring, myself and our kids were mortified.
IABU - There’s nothing wrong with making conversations public
IANBU - It’s really crass behaviour