You don’t ask people to speak how you want, you simply only invite people who already have a history of speaking how you want. This phenomena is explained in detail I. Noam Chomsky’s work around mass media (eg NY Times doesn’t tell their editors what to do exactly, but only hire editors who already want to say what NY Times wants, or have a certain world view). The same can be applied to social media reviews. Invite the person who gives glowing reviews all the time.
Do you know where Noam makes that argument? I've been trying to figure out where I picked it up years ago. I'd like to revisit it to deepen my understanding. It's a pretty universal insight.
"I don't say you're self-censoring - I'm sure you believe everything you're saying; but what I'm saying is, if you believed something different, you wouldn't be sitting where you're sitting." -- Noam Chomksy to Andrew Marr
It's a shame the interviewer didn't quite grasp that point and dig a little deeper into it. Listening to it again I'm reminded of "The masters tools will never dismantle the master's house".
Though this is often associated with his and Herman's "Propaganda Model," Chomsky has also commented that the same appears in scholarly literature, despite the overt propaganda forces of ownership and advertisement being absent:
