freitasm: And on this... People who walk out of a retail store into the footpath without looking to each side or at least to the side closest to the door. You wouldn't do this when driving, so why do when walking? And yes, people who leave the lifts and stop just after a step to say "Oh, hello" to someone waiting to board, blocking everyone from getting in or out. 

...and people who step off the end of an escalator, then stand there talking or looking around while the queue of other people trying to get off piles up.

I'll tell you something that's really starting to piss me off: those pictogram math puzzles that appear every other week and "break the internet", e.g.:

They all seem to contain the same two tricks to try and confuse people:
1. One or more of the symbols in the final (question) formula are not the same complete symbol from the earlier (sample) formulae, (e.g. only one boot or horseshoe in the question when they are shown in pairs in the samples).
2. In the question, the addition is shown before the multiplication in the hope that you don't remember PEMDAS (or BODMAS, depending on where you went to school) and will do the addition first.

The same thing keeps popping up every couple of weeks, just with different symbols, e.g. fruit or shoes or (in the last one I saw) McDonald's takeaways. I'm over it. It's old. Please stop. The internet isn't broken, or even confused, by your basic maths problem anyone over 10 could solve.