At Wharton we hire an outside firm which does professional checking up on applicants, and one of the things they're obviously well-versed in, and trained to detect, is of applicants cheating on recommendation letters.
In addition, echoing 'sameoldstory', I would be very careful what you write on all these forums. Even Chasedream. Admissions committee members know more than you think about where applicants from each country get their information.
That's not what I meant. I meant that even without the LZ posting on BW, admissions committee members know about chasedream (would you think they don't?) and some of them do visit CD as well.