I wasn't being entirely facetious although it might have seemed that way. The instamine (and cutting of mining rewards, which is what redirecting those to masternode operators does in economic effect) is arguably a good thing for investors because as long as the insiders don't dump, it drives the price higher and higher. Everyone thinks he can get out before everyone else.

In terms of anon-specific tech, no I don't think so.

1.) We're decentralized. The clients automatically discover all masternodes and will use those
2.) Everyone will use DarkSend by default. The problem with a product you must setup like this is you'll have far fewer legitimate users to mix with. 
3.) Masternodes create a new type of investment opportunity within our ecosystem much like mining. The result? We get a ton of super high quality full nodes, anonymity and happy investors.
4.) If they're accepting inputs and outputs separately they can be shut down simply by a user offering an input, but refusing to send the output. If they're accepting inputs and outputs together, it's not anonymous and it MUST be decentralized to spread the knowledge of who did what to keep anonymity. My guess is they're taking inputs and outputs separately and banning inputs that do this. In that case you could attack it by using another mixing service to get fresh inputs.