http://www.docstoc.com/docs/33246924/Warning-for-Collectors-of-Czech-Art-Glass-from-the-years-1930-to that one is from PK searching on glass gets a lot of hits. Purpose of site seems to be
1. Google ads income
2. Selling subscriptions so that you can buy articles...hmmm
Carnival glass - lots
Seem to specialise in taking pdfs from websites, pretty arbitrary selections.
Then they make it hard to get stuff removed
http://www.docstoc.com/user/cmsstatic.aspx?page_id=100 A physical or electronic signature of a person authorized to act on behalf of the owner of an exclusive right that is allegedly infringed.
Identification of the copyrighted work claimed to have been infringed, or, if multiple copyrighted works on the Docstoc web site are covered by a single notification, a representative list of such works at that site.
Identification of the material that is claimed to be infringing or to be the subject of infringing activity and that is to be removed or access to which is to be disabled, and information reasonably sufficient to permit Docstoc to locate the material. Providing URLs in the body of an email is the best way to help us locate content quickly.
Information reasonably sufficient to permit Docstoc to contact the complaining party, such as an address, telephone number, and, if available, an electronic mail address at which the complaining party may be contacted.
A statement that the complaining party has a good faith belief that use of the material in the manner complained of is not authorized by the copyright owner, its agent, or the law.
A statement that the information in the notification is accurate, and under penalty of perjury, that the complaining party is authorized to act on behalf of the owner of an exclusive right that is allegedly infringed.