2 of 2 The word "shift" didn't show up here

This particular sequence is just holding down SHIFT and typing 1234567890. So I am assuming that they are disallowing this particular sequence because it is simple for a hacker and a lot of people do this. For example, I have seen people use QWERASDFZXCV for a password which is insecure because you are just holding shift and moving down the left side of the keyboard.