I think this will be an interesting topic since we have both FTMs and experienced mommas on this board.
So, what things do you see other parents do that just irk your nerves?
For me, its when I see parents telling their children that they can't have something because they can't afford it. Your 2 year old does not need an explanation as to why you are telling them no....and they don't need to feel guilty because they wanted a candy bar. A simple "no" works just fine.