Unwritten rules that MUST be obeyed?

[~Hestia~]

If you're going to stand on an escalator, you stay to the left leaving a clear passage for others to pass on the right

[Little Chicken]

If stopping for a chat with friends you have unexpectedly met in the supermarket, move to the side of the aisle so other people can get past. Do not just stand in the middle completely blocking the aisle and ignoring the stares of death coming your way from other shoppers. This also applies to footpaths etc.

[skybie]

if you're going to stand on an escalator, you stay to the left leaving a clear passage for others to pass on the right

yessss!!!!!!