commit: 6b2ca8a - #414 (2014-03-05 12:54:44 -0500)
Greg, Negative SEO is real, but requires a lot of time and commitment.
Yes, but there are services who hire cheap labor to do it for you. You could get thousands of backlinks for $100-$200 if you search for it. But as I said I don't think it's very effective when done against a quality site.