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^By that measure, having a bunch of pages indexed with no crawling, no titles, weird titles, and/or no description might also adversely affect the Google rankings and traffic of other pages.
If you're that worried about it, you should probably be removing the page all together and returning a 404 or 410.
Having one page on your site that is flagged NOINDEX is not going to adversely affect rankings of other pages on your site.
even if someone at Google says that it can't (or can) doesn't mean that is true either. They dont always tell the truth
I have never once seen one shred of evidence that would support the "hypothesis" that noindexing one or even dozens of pages on a site has adversely affected that site's rankings in any way.
I don't see how this proves anything one way or the other.
In fact, if the nodexing of some pages has no effect, then it seems to indicate that the Google algorithm continued to take account of the content of those pages even after they were noindexed, which supports my argument.
Do you really think that the Google algorithm will totally disregard that page simply because of the noindex tag?
By the way, earlier in this thread I tried to ckarify the issue by giving a clearcut example as follows:
Suppose you have an established site about growing roses. Then you add a noindexed (but crawlable)page full of porn words and you also sell links to porn sites on it, and you also link to it internally. Do you really think that the Google algorithm will totally disregard that page simply because of the noindex tag?
I haven't seen any responses to this, so would like to ask again: Does anyone really believe that adding this page, even with a noindex tag, wouldn't hurt the rankings of the other pages on the site.