What do your friends value? What options which are competitive with "join the NSA" are better at achieving their values than joining the NSA? Sell them on those other options.
Be prepared to discover that people of good will can have sharply different values than you do, for example believing that "'service to our nation' is a key priority for me", or might have sharply different estimates of the utility of joining the NSA in effecting values such as "I desire a future in which Americans continue to be afforded privacy in accordance with the intentions of the framers of the Constitution."
Do your friends value earning lots of money and not having to run their dates past their bosses for approval? If so, getting a job at Google strictly dominates working for the NSA. etc.
Be prepared to discover that people of good will can have sharply different values than you do, for example believing that "'service to our nation' is a key priority for me", or might have sharply different estimates of the utility of joining the NSA in effecting values such as "I desire a future in which Americans continue to be afforded privacy in accordance with the intentions of the framers of the Constitution."
Do your friends value earning lots of money and not having to run their dates past their bosses for approval? If so, getting a job at Google strictly dominates working for the NSA. etc.