I don't know why the sound from a phone or other device when someone's watching YouTube or films drives me batty.
I'm on a fairly busy train, trying to read. People are talking and laughing and I can tune that out, but I can't tune out the device noise. It doesn't bother DS at all. Is it just cos I didn't grow up with it? Maybe I am harbouring feelings that it's antisocial to force your own entertainment on others?
The Eurostar asks people to wear headphones so I don't think it's just me being uptight.