This is meant to be fairly light hearted, but really, so many things annoy me/make me judge people these days... Is it just me? Probably...
Just a few examples from recent days.
Mother at the playground lighting up, around lots of small children, and then just throwing her still smoking butt on the ground next to the slide. There was a bin about a metre away...
All the litter around London. Why can't people use bins? I come from a country with a similar culture to the UK, but there is no litter or dog poo, because everyone is taught from a young age that littering is just not on.
All the teen guys walking round with their hands down their pants and/or their trousers half way down their legs. I reckon the police should caution them for indecency... 
Young children walking to school in the morning with a can of soft drink and/or chocolate bar in their hand. Very common around where I live.