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I have been doing some article submissions, press releases etc for the past 2 months
Average count of articles isn't important
We do our best, this has never been an issue with google.
Planet13 be nice :)
...ultimately it is the publisher's responsibility to ensure that the activity on his or her ads is valid. For this reason, we highly recommend that you review our tips for preventing invalid activity. You can also notify us of sabotage incidents
The red type above indicates https links - they don't work with our board software here so please copy/paste the link at the bottom of the quote box to visit the Adsense page directly. I believe that second link (notify us) goes to a form within your Adsense account.
The kind of geographic variety you describe can be accomplished through proxy servers, networks set up like Mechanical Turk, or even a botnet.