Fired up Ahrefs to check my recent link building efforts and realized that some idiot has been spamming me for the past month with GSA style blog comments and social bookmarks! This asswipe used gambling and pharma anchors such as casino, tramadol, zithromax etc etc etc. There was like more than 400 links recorded by Ahrefs in a single day! What should I do now? Does this happen often to you guys? Will Google's disavow tool work? Any advise much appreciated!