Ban the use of electronic device loudspeakers in public & require headphone use

Require the use of headphones to listen to this content in public spaces. I believe it’s an invasion of one’s downtime / travel time / private time / personal time when members of the public play whatever they want on their electronic devices on loudspeaker in spaces where they can wear headphones to listen to their content of choice.

It is invasive for many around them, can be rude and embarrassing if they are having conversations on phone calls which the whole train carriage of people may not wish to hear.