Hmmm, let me see..... only 11 comments here. There should be many more given that Ars Technica wrote an article about you and your findings.
Is it too hard to believe people like to troll BlackBerry? Those funny reviews have gone viral... people are posting them everywhere. I downloaded and installed BBM on my HTC One S and left a 5 star review and I used the same sentence in my review (I'll give you my email and Pin and full name if you want to check)
I've been following BB for for a year now. The press, blogs and comments have always been overwhelmingly negative ("too little too late". yada yada yada... etc). Any good news about BB is immediately countered with a negative article. And your article follows that M.O. : The headlines are reporting BBM is having a successful launch on iOS and Android.... and lo and behold, the next day another negative report tarnishing BlackBerry by accusing them of writing fake reviews is published and picked up by every news organization. You need evidence before you make accusations.
P.S. how do we know you are not responsible for those "fake reviews"?