THIS IS NOT A DIFFICULT CONCEPT.

By taking the escalator (or walkway), you acknowledge that ease has a cost. And the cost is that you need to get out of the effing way if I’m walking up the left side. It is my right to walk up the escalator, and I will defend it to the death. 

I am in a hurry; I have no time to wait behind you. Also, don’t you dare glare at me as I say, “excuse me” while trying to circumnavigate those 85 shopping bags you’ve dumped. It’s an ESCALATOR. THE SIGNS ARE CLEARLY POSTED. IT’S NOT AS IF WALKING LEFT AND STANDING RIGHT ARE NEW CONCEPTS.

In summation: Get out of my fucking way.