I was on a bus earlier. A young woman in her 20s was on her phone yacking away at top volume from the minute she got onto the bus; finishing one call and immediately calling someone else. This went on for about 20 minutes and eventually a middle aged woman sitting directly in front of her turned around and said 'Can you please just stop shouting into your phone and show some consideration. You're doing my head in'.
Younger woman looked a bit shocked but ended her call and we all got a bit of peace.
AIBU to wish I had the courage to do something similar. I am fed up of people around me gabbing away loudly into their phones on public transport, barely pausing to draw breath for the entire journey.