One of my sites that is ranked #1 for some keywords is hit by aggressive negative SEO. My site has PR 1 and is ranked #1 for few months. The links that I am getting are spammy and with same anchor text - "child porn". I had 500 backlinks, and now I am getting approximately 400 backlinks every day. Links are mostly blog comments and 70% of them are nofollow. My questions are: 1.) Should I expect some Google penalty? If yes, when and which penalty? 2.) Is it more dangerous for me if I am getting backlinks with anchor text "child porn" or backlinks with anchor text for keywords that I am ranked #1? Thanks in advance.