If I PM someone and say "Can you red trust this person/exclude this person/support this flag/oppose this flag." - Definitely manipulative.
If I PM someone and say "You must red trust this person/exclude this person/support this flag/oppose this flag, or else I will red trust you/remove my inclusion of you/exclude you/not give you any more merit/share your nudes." - Blackmail/Threats.
I allowed myself to correct you wording in bold.
If someone that has some high reputation/is your friend/etc, explicitely asks you to do something, it definitely is manipulation.
Second example is 100% blackmail tho.