Instructions:
After reading the Definitions, look at the following websites and categorize
them as "Nonspam" or "Spam using a specific type of spam techniques".
Before you start, we strongly suggest you to view our spam sample images.
Note: Be patient and check pages carefully! We will invite good mturkers for our next tasks with a much higher payment!
Definitions:
Spam: Spam pages offer very little of value AND are designed primarily to tempt people to
go to another Web site by manipulating search engines' ranking systems.
Some known spam techniques include:
- (TYPE1) Keyword stuffing : adding keywords repeatedly or adding irrelevant keywords in the page.
Checking method: you can view the source of a html page to see whether some terms (such as "free", "cheap" or "ipod") are repeated too many times.
 
- (TYPE2) Link farms: building densely connected link communities of different sites on purpose.
Checking method: you can see that many different sites pointing to each other. For example, site A have links pointing to site B and C; site B points to A and C; site C points to A and B. Note: if only a few sites do this, it is ok. But if you see that more than a few dozens sites doing this, then it is a problem.
 
- (TYPE3) Link exchange: allowing mutual links.
Checking method: usually there is a link with a tag "links", "link" or "resource" on the home page of a spam site and within that page, they mention explicitly that
if you put a link to them on your web site and let them know, their sites will point back to you soon.
 
- (TYPE4) Cloaking: sending different content to search engines and to actural users. For example, the copy sent to search engines contains more hot terms.
Checking method: looking at the cached copy from a known search engine and the copy from your own browser.
 
- (TYPE5) Redirection: the page will automatically redirect to a spam destination page.
Checking method: You can find that the URL you input and the final pages on the screen are from different sites. Note: some redirection is legal, but spammy redirection will land at a spam page, for example, if you input "http://www.drugstore-info.com/", you may see one of the following pages with different urls.
 
- (TYPE6) Faked search engines: the pages look like search results, but actually the contents are from google or yahoo's ads.
 
Note: if a page uses more than one spam technique, just select one. It is good enough for now!
Nonspam: The page doesn't use any spam technique.
Other: The page does not exist (such as a 404 error), or for other reasons you cannot evaluate (such as a foreign language)
WARNING: Some of these links may be to very offensive sites. We don't know what
they link to.
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