brinked - 5:01 am on Jun 7, 2012 (gmt 0)
Wow. I am sorry, I understand the reasons for this type of thing but I am 100% against this move.
This all sounds great and I too was on the bandwagon everytime someone mentioned this. Until one day I read a post on my iphone that said google had allowed webmasters to discredit links in webmaster tools. My heart immediately began to race in thinking what I should do. Then I started thinking about it and I suddenly was no longer for this type of feature and here is why.
What if you x out some links that you think may be hurting you. Maybe you dont recognize them or just have a suspicion they are hurting you, what happens if you shoot yourself in the foot and actually cause your site to drop even more? Can you re-allow those links? If you can, this will effectively let webmasters see what links work and what links dont work for rankings. "ok, if I disallow these links, my rankings improve, if I remove these, my rankings fall".
Many webmasters think the reason why their website fell was because of their backlinks (which is not always the case). So they will go ahead and x out all the links they bought etc and again shoot their own foot.
The only type of links I can see this would be good for are obvious paid links which usually come in the form of sitewide/blogroll links or if you got into a link scheme with thousands of theme footer links. They can sometimes be difficult to get them removed by contacting the webmaster. And even with the case of the schemey theme links, they should just be discredited regardless by google since any competitor can buy them for relatively cheap.
Even then, if they use this, it should be a part of a reconsideration request. Shoot over a reconsideration request showing all the links you want discredited with an apology. Maybe allow up to 3-5 reconsideration requests a year or something like that so it doesnt get too crazy.
By the way, that blog post turned out to just be a post asking google why they dont offer that feature, I completely misread it at first glance on my iphone.
edit: wow I'm sorry. disavow is an actual word. Holy crap, it means to deny any responsibility for which makes sense in this case. Here I was the entire post thinking someone misspelled disallow. Well jokes on me..but not really because somebody just expanded their vocabulary..that's right.