Dan, I agree the memo seeks to (positively) deter crew from taking extra fuel, but you know as well as I do that the company would always defend that memo as not an instruction to compromise safety with regards to fuel.
However, can you offer actual evidence or facts that if someone exercises their right as the PIC to deviate from the memo and take extra fuel because they believe safety will be compromised has been negatively disciplined for doing so.
Is it the perceived fear of what will happen to them that deters people or have examples been made?
I think we need to know what happens to those who deviate from the memo.