Don't wreck everyone's commute with mindless phone chatter
To prevent the jam-packed underground steel tube from devolving into some dystopian hellscape consumed by a cacophony of inane gossip and "can you you hear me?!?," please refrain from yakking on the phone whenever you feel the urge. Obviously, if it's an emergency or something, that's different, but please spare us all from having to listen to you loudly recap last night's Bachelor episode for your nana.
Don't get too transfixed, you bumbling underground zombie
Now that we're tempted to stare down at our screens even more than we already do, please remember not to blindly amble head-down on the platform, especially as a train's approaching, lest you stumble and fall, or worse, bump someone and cause them to. Also, try to periodically look up from Snapchat stories to scope out the situation in your car and make sure you're not violating any age-old cardinal rules.