The only way you can’t be manipulated is if you are dead. All human interaction is manipulation of some sort of another. If you think your immune, your likely very vulnerable. If it’s delivered in the correct way, since your not bothering to guard against it.
An interesting factoid I’ve ran across a few times. Smart people are far easier to rope into cults than stupid people. The stupid, have experienced that sort of manipulation before, and so have some defenses against it. The smart people assume they wouldn’t be caught up in something like that, and so drop their guard.
In the words of Mad-eye Moody “Constant vigilance!”