As much as I agree with you here, it'd be nice to get first-hand evidence of it this year. Djoko and Fed have been in the same half 2 years in a row and I hope Nadal ends in Djokovic's half (at the very least) to prove our worries wrong. I am not banking on it though.
3 instances are too few to prove or disprove randomness. It is possible to throw 3 coins in a row and all landing on heads. Novak got the #3 in the summer of 2007. If you see the draws after that:
2008- Novak in Rafa's half
2009- Novak in Roger's half
2010- Novak in Rafa's half
2011- Novak in Roger's half
2012- Novak in Roger's half (But this one shouldn't really count: Novak was #1 and Rafa was #2, it was impossible for Novak to be in Rafa's half).
This is completely random-looking.
But the probability of Novak being drawn in Roger's half and Murray in Nadal's half for 12 times in a row in AO, USO and W is 1/4096. That's small enough to be suspicious. But those are the other 3 slams. Roland Garros never did something like that.
Which is why it is unfair that people start accusing RG of fixing draws based on what the other 3 slams do.