No.

I've been wondering about this too.
How do you prevent rouges setting up hundreds of nodes that collect data about transactions, without a financial barrier to disrupt the network and create many men in the middle sniffing transactions as they pass around ?
Yea, that's why DRK's masternodes are not an ideal solution... because it is a centralized solution.
It's not centralized if it's distributed globally on an individual basis. The amount of coins you would need to have enough nodes to collect even a tiny bit of useful data would be a huge percentage of total available . . . You know what, never mind just go think about it OK?
Also, look up sarcasm. . .