Action that, when taken, immediately makes my opinion of you go down to “moron” or lower:
Pushing the crosswalk button or elevator button when I’m already standing there waiting for it.
Hello! I am not a moron and standing here without pushing the button. By pushing it, you are insulting my intelligence and disrespecting me, and therefore deserve no respect. Especially with elevator buttons where you can already see that it’s pushed.
I’m sure I’ve ranted about this already, but it happened not once, but twice today. At the same crosswalk.