Facebook Page Administrators Can No Longer Mark Comments As Spam. Cloaking to Stop Scraping. Cloaking is generally thought of as a black hat SEO tactic that involves tricking the search engine into believing that a page has one thing on it when, in fact, visitors will see something else, often completley unrelated.
However, cloaking actually much more broad than that. Though the black hat use is the best known, it can also be used to offer different content to different browsers to ensure compatibility, different sized images to different screen resolutions or even display content in different languages based on country. Any time a page automatically dispalys different content to one person or one group of people than it does another, that is considered cloaking. White hats, recently, found another positive use for cloaking, the ability to stop scraping by providing different content to a scraper than to the rest of the world.
The Spamhaus Project. Spam – junk email & messages : Australian Communications and Media Authority. Just the basics. "Spam" is defined as unsolicited commercial e-mail.
It is sent to you by unscrupulous people trying to make a fast buck -- usually by ripping you off. Many spams say that you can get off the mailing list when you ask, but very often if you try it, it leads to more junk mail because you're confirming to these unscrupulous people that your address is good. Just throw away any junk mail you get. Spam Primer.