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I agree with chris, if its not needed why have it? As for doing harm, Duane Forester from Bing advised not to do it, and said that sites that misuse the canonical tag, Bing will ignore them all together. There is also the line of thought, that we know that canonical tags do not pass all link juice, just like 301's or any request, there is a certain amount of decay, 15% in the original google algorithm. It just may be that when you have a canonical back to yourself, it is followed and that you get that decay unnecessarily

Thanks a lot. I will have a look at them.

Thanks all for suggestions...

I ignore these links when I'm doing a backlink audit.  If you've got a penalty, I would look elsewhere for culprits.  There's no harm in disavowing mrwhatis, but my guess is that Google knows that these are not self made links and just ignores them too.

Hi Armin, Let me give you an idea on what could happen, if Google finds you development/ staging site what happened in a case I saw happen is that the site lost over 40% of traffic for 2-3 months until it was fixed. Costing the site a couple of million visits, guess what that did to the revenue ;-). Edit: a couple of million visits, not money ;-).

Wow ! Thanks fir that Vahe, very useful indeed !

That's an idea Keri... I think the answers so far have helped pay for this months subscription already!! Thanks ...but if anyone else has other ideas, keep them coming

Hey Trevor, Thanks for reaching out and apologies for the issues you're running into. I'd be happy to look into this further, but don't want to necessarily make you share your info here in the forums. Can you send a ticket into our Help team for me? I'll keep an eye out for your message. Thanks again! Best, Sam Moz Helpster

Guys, My Blogguest was confirmed as the penalised site - http://searchengineland.com/googles-matt-cutts-weve-taken-action-large-guest-blog-network-187028

Hi Cesar, Do you mean landing pages? We don't provide the ability for you to make your own website/pages via Moz Analytics. Can you elaborate a little on what you're looking for? Thanks!

For such a massive duplication and linking from the same IP, I would definitely follow the canonical / nofollow route - do you know how long it will take the user to implement these? In the meantime, there isn't terribly much you can do - you definitely do not want to do anything like disavowing the links (you should only do that if you receive unnatural link warnings or have been hit by a penalty or negative SEO attack). The quicker the tagging can be done, the better in this case. Although Google should understand and disregard, I did have a new client penalised back in 2010 because they were sharing a financial widget across a range of Australian newspaper websites that were all owned by the same company and thus all on the same IP. We got the penalty removed with reconsideration requests but were about to implement a network-wide nofollow on these little widgets before we submitted the request.

Hi Guys, Thanks for the great feedback

You're welcome