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The first would be to indicate if a page is commercial or not. The second tag would indicate if the site’s webmaster is White or Black hat.
Google the can add an option on the search page where you can search for commercial info or not. Personally I will find it very helpful because sometime I’m looking for something to buy then I can do a search with commercial on, but if I’m just looking for information I will switch commercial of.
Yes, I know some webmasters will cheat, so that is there the second tag come in play. If the Webmaster is “Black Hat” Google can just ignore the page.
I do quite like the sound of the first tag although I still think users like to keep search simple so am not sure if this would work with most searchers.
Why would they cheat on only one tag and not the other? And if they are going to cheat wouldn't they cheat on the hat tag?
PS: How do you get posts like this past the pre-moderation? I've hardly ever get any of my posts approved. :)
<meta name="Google_PR" content="8">
<meta name="DMOZ_Included" content="True">
I use them on one my site. With true information, of course. And I do it for joke - they can't hurt, but if the site were manually reviewed by a folk from Google, and he appreciated my sense of humour, he wouldn't penalize my site :))
A bit more seriously, the idea of marking commercial sites is great, in my opinion. And I agree there is Froogle and Adwords, so in order to keep things simple, Google could just throw away all commercial sites from normal search results ;))
There could be a simple rule to enforce honest usage of this tag - if you lied you're not commercial and you are, the domain would be permanently banned.
But it can be achieved without using the tag - there are special domains that can be used only by non-commercial sites, so having such domain marks the site as non-commercial, and preventing the cheating is a task of registrars of these domains.
And obviously, .com domains were intended to mark commercial sites, so it's a pity that commercial sites are allowed other domains - if they always used .com domains, it would be so simple to distinguish.
Disclaimer: The opinions written above are not strictly serious, they are only intended to point a few issues related to this thread.
Admittedly, there may be few of those. But it is the same principle as the one used by governments across the world for visa applications. You know the forms that say: "Are you trying to enter our country to commit genocide or terrorism?"
Catches me out every time.