Smartphone addiction is everywhere but we need to remember the person who serves you in any shop is not a machine. It is now so common to see people on their mobile phone in the queue but they don't hang up when they reach the checkout. A quick survey of shop assistants confirms this always ranks highly in their customer gripes/frustrations.
From turning away from the shop assistant and saying, "this girl thinks..." as if she's not there, to the passive aggressive making a call and talking about someone while they are still in the area.
I had this happen on the train when I moved someone's bag so an elderly gentleman could sit down and the bag owner telephoned a friend and complained about me, while sitting opposite me, for a good hour. When she got off everyone on the train started talking to me but we were all a bit intimidated by her and no-one wanted confrontation. I've also seen people say that they have noticed the person next to them on the bus texting about them and making no attempt to do it discreetly.
Crossing at a pedestrian crossing is so uncool these days but instead of walking faster when a car approaches, some pedestrians choose to slow up and offer some 'front'. The last time I checked, no-one looks cool squashed under a car but I'm sure these pedestrians wouldn't see the accident as their fault.
When did we start expecting and not being grateful? Yes, it's someone's job to sweep the streets but that doesn't mean we shouldn't say thank you. There's this "that's what they're paid to do" attitude as if recognising what others do and being polite is no longer required.