If the OP is indeed trying to blackmail you now for more money and whatnot, then he also deserve a negative rating. I'd even boldly state that OPs behavior is worse than yours considering that you've *come to a realization* that what you did was wrong (hopefully).
Op is a blackmailer , while reading the conversations(http://imgur.com/a/8QfKk), i figured out that Imsorryall is a student and Op is trying to mint money out of his mistake. In this case i feel that OP deserves the negative ratings.
OP is full of bullshit. Not only is this criminal, he has indirectly admitted to blackmailing said user. I have neg. rated him as well.