Blackhat Negative Value for sites linking to my site

[Hillside]

Okay, so I find this weird

Why do I have a negative value? Should I get worried with this?

 

[warrichpk]

Frankly speaking, let me tell you that this is the first time that I have seen something like this. I know it is rude, but I don't know if Google likes your site or not? Why on Earth would Google assign a -ive number against a number that should always be +ive??