All buses should have a deep bucket of water next to the driver's cab. Passengers should be empowered to drop the phones of users playing music or taking calls without headphones into the bucket.
@anon_opin Same goes for cinemas and theatres. If any light from a phone display is seen in the dark, the phone should be snatched away and immediately destroyed. Those people can get straight in the bin.
@anon_opin This is your annoying scheduled reminder that iPhones are IP68 water ingress-resistant, as are most Android models. Headphones, in contrast, can usually be killed by immersion (but that's the exact opposite of the message we want to convey here) …