Former PsyOp guy here with OEF experience, now working in cybersecurity. Please feel welcome to ask me (almost!) anything, and I'll do my best to respond. edit - this TTP FM [0] (warning, PDF ahead) seems to be freely available, and gives a comprehensive overview of what PsyOp actually does in the modern US Army. Perhaps most relevant for today is propaganda analysis and the SCAME method, a multi-faceted approach to…
What possible ethical basis do you have as an individual have to mess with people (lots of them), lying, misleading, misinforming, etc in order to achieve a goal?
Who decides what is a 'good' goal? Does it matter, or do you just do what you are told?
I know the answers - you're just following orders, you believe you are working for the good, etc. These are not valid answers - you cannot pretend the actions you take against others are ok, because you were just following orders.
Order following and misleading others at scale, makes you part of the problem.