Negative SEO and Disavowing
Just a quick question, I have noticed a number of negative SEO attacks on my sites in the last couple of months. It seems that people are more and more resorting to dirty tactics nowadays, which is a sad sign of the times I suppose.
I use the Google disavow file for such things, I was just wondering do any of you lot regularly update the disavow file? Is there an accepted time period that is ok to keep it updated? e.g. once a week, once a month?
I've been picking up iffy links pretty much every week, someone's been on my case but they have their sites carefully privacy protected so i can't be sure who is behind it, but the links are certainly not the sort that I want as they are keyword heavy from very low authority, brand new sites.
Do you write notes in your disavow file? I have no actual penalties in Webmaster Tools, but am wondering if putting notes in might be worthwhile e.g. 'negative SEO attack' next to the bad links. Plus is there any official way of reporting a negative SEO attack to Google?