Great question, Doug. 

We file the news blurbs into folders by date (year or month).  When we abandon a folder we place an .htaccess file in that folder with specific redirects as the first few lines and then a wildcard redirect as last line.

Looks like this....

Redirect 301 /blog/2010/story-1.shtml  http://mysite.com/blog/2012/replacement-for-story-1.html
Redirect 301 /blog/2010/story-2.shtml  http://mysite.com/blog/2012/replacement-for-story-2.html
redirectMatch 301 ^/blog/2010/ http://mysite.com/blog/

Every site has these types of visitors.   I am sure that many of them are nice people. 

What's the difference between these types of visitors and paying for a billboard along a highway where you advertise to random people passing buy?

Your website will be relevant for some of these visitors and if you get enough of them guaranteed that you will get some sales.

I don't think that the Pope would mind if these visitors were dropping into his site.  He still gets to show them his message.  

I understand the content creation problem.  I have graduate degrees and decades of work experience in my topic area.   Content creation still is a laborious undertaking.

In the biotech and medical areas your writer needs a strong background in the content area.  Without that he/she will quickly be spotted as a noob by people who know their stuff.   This is long, careful writing that most people don't want to do.

Let's say you work really hard to make nasehi.co a very interesting and valuable site but I own nasehi.com.   You know that lots of your hard work is going to enrich me because lots of your visitors will type nasehi.com instead of nasehi.co.  Maybe I will get 10% of your type in traffic.  Also, some people building links to nasehi.co will by error make them to nasehi.com.

Thank you!

IMO "stop words" are a hoax.

Probably a Panda problem.

The site has thin content:  Lots of the pages have close to zero content.

The site has duplicate content:  Content was stolen by your client or others stole it from him.  Look here.

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The title tags need work:

<title>woody-coloring-pages-002 - Coloring Pages ABC Kids Fun Pagetitle>

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The site has a huge intellectual property problem.  There may be DMCA's against the site.  Rankings could be reduced by the Emanuel Update.

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Potential Penguin problems:  The site solicits "link exchange" and "link partners".

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My advice to client would be to abandon this site unless he has rights to the images.

<title>woody-coloring-pages-002 - Coloring Pages ABC Kids Fun Pagetitle>

Am I right or wrong here?

I agree. I think that Google has lots of problems here.

sulfur and sulphur have lots of problems

gray and grey have enormous problems

From what I see proper nouns for names of people, places and things cause a lot of the problems - but there are lots of webpages that seem to be overlooked or unreasonably ranked.

Any help.....

I don't have any help.  I can only say that I am gunning for American English usage as that is where I think I will get the most traffic - and that is where my website is hosted.

Subdomains are often viewed by google as different domains.  That means, links that hit one of them benefit that subdomain but transfer fractional benefit to other subdomains and to the root.

If this was my project I would use folders instead of subdomains.  Your designer can make them look unique if that is needed, however, with them all being in the root directory all of the incoming links will benefit the entire site.

In early 2011 I redirected two subdomains of a busy site (one more powerful than the root domain) into folders and the results have been kickass.  Kickass.