Too often this word is used as a reason to not take responsibility for one's behavior.
The word "should" is way too often used as the gateway to NOT doing anything.
Flip Wilson's "Devil Made Me Do It" routine says it best...and is often the reason folks use to set up the Blame of Others rather than Place Responsibility Properly.
Hence, the veiled joke of...
While I know it's my fault, I'm going to blame you anyway...and THAT is IRRESPONSIBLE!
Everyone Chooses Own Consequences!!!