Anxiety Aunt: Is it acceptable to be on FaceTime or speaker phone in a busy public place?

Dear Aunty,

A café-goer expresses frustration about a loud FaceTime conversation at the next table during a birthday celebration, making it difficult for her and her friends to hear each other. The Aunt advises that such behavior is rude and suggests that speaking up is necessary to discourage inconsiderate actions. She recounts her own experiences with phone distractions in public spaces, emphasizing the importance of respecting shared environments.