5. PUSHING A PULL DOOR
Possibly nothing on this list is as embarrassing as walking up to a door and being unable to open it on the first try. It turns out that we still get this wrong all the time because architects and designers don’t care about how dumb you look—they just want their building to look pretty.
Even when establishments are willing to sully their nice entrances with “push” or “pull” signs, there is the issue of those words looking almost exactly the same. It’s still such a problem that as recently as 2011 there was a contest to design a sign that door openers could never mix up.