Delete bad backlinks or just build more good ones?

As always, build a new webpage & point fresh quality links at the new webpage. Either it ranks or it doesn't.

Use an easy same niche keyword while testing, that way competition isn't a factor. If the page ranks, target your regular keywords with new internal pages & more quality links.

Unless you control the old junk links odds are removing the links isn't an option.

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Try to remove them if you can. First, take care of the ones you can handle yourself. i.e., the ones that are easily deleted by logging into the forum and removing the post.

Because they are so few, don't worry about chasing down webmasters to have them removed. Just take care of the ones you have access to.

It may not amount to much (good or bad) but the reality is that search engines (ahem, Google) are doing a lot to punish link building like this. The last thing you want is to do a lot of good link building from now on and, a few years from now, losing all that value over early mistakes.

Good luck!

Delete the bad links and disavow the ones you can't deleted. Then build fresh quality links. Alternatively, start over with a new domain name and build quality links.

That's a great question, likely to cause debates and split opinions... So each to their own with no hard feelings... For me yukon's advice above is a good one...

Personally I see G's disavow tool as the strangest thing.... You're basically admitting to gaming the SERPs... Post disavow like many others I believe the algo becomes much more sensitive to link building... If you took G's view of the world, then web masters shouldn't even dream of creating links in the first place with the purpose to improve ranking... So its a conundrum in that sense lol...

That aside I would say that you should first test to see how your website responds within search. Can you search for your domain, does it come out on top, have you tried searching for unique bits of text from your web pages.... etc.. and see if there is anything unusual... If that is okay then my view is not to disavow... as your website is responding well for search.

Also you should look at your site content... Is it thin, over optimized keywords etc... and see if you can make improvements wrt on page seo before considering drastic steps to disavow... With G it seems to be more about what not to do than what to do...

Also realize that many of your links could be nofollow so you need to weed that out of your linking profile and see what is left... You might be surprised... noting disavow in principle is the same as turning your dofollow links to nofollow...

Another thing you should also bear in mind is that even though you report a fall in your rankings... it might be that some of your backlinks have become weaker... Lets say a website which provided a great authoritative link got hit by penguin.. Its now no longer going to give you that same link juice and as a result your site will be impacted... Does this mean you got hit by a penalty...No it does not!!! So you see you need to see past the fog of war...

I hope some of my comments can help and of course best of luck with your research and on your decision on what to do....

If your website tanked post Penguin update that means your rankings are in the crapper until you clean up the preexisting links.

You can build high quality links but that will not help. You weren't around but the constant threads promoting this theory last year when Penguin was rolled out never amounted to anything. In fact if you go back in time and look at the posters that did that last time they are still posting now about how that didn't work and asking what to do just like you.

You need to remove the low quality crappy links if you want to recover your rankings. Don't make it worse by building more bad links in hopes you'll recover.

Hello, check whether all forum backlinks are qualitative or not. If not, try to remove those links. And if you have given the same anchor text for all backlinks, try changing that using long tail keywords. If you have all the backlinks,which are pointing to one single page, keep the page as it its but change the anchor text. And henceforth try building backlinks for some other page.

Firstly check all forum backlinks are quality based or not. If not then try to remove bad links and if you are creating same anchor text for all backlinks please change it or your targeting page it same for all links then also change it. After that try to build quality based links.

How in the earth can someone delete 20.000 blog comments backlinks?

I Will Suggest You To Remove Old Spammy Links And Post Quality Content