How to activate negative rating option in profile settings?

[Adny]

neutral =/= negative rating. Having no option to give others negative rating is the default setting for this forum, and to be honest, I'm not sure if there even is a way to turn it on (I just took a quick look through the user CP and found no options).

This is strange to me, because I have seen some members with negative rating; I think it can only be given by moderators? Idk.