VisualStudio has a similar plugin: https://visualstudiogallery.msdn.microsoft.com/a1166718-a2d9...

Invencia analyzes stack exchange sites to classify malware based on method calls:

http://www.youtube.com/watch?v=u6a7afsD39A

that's basically exactly what they're talking about. Though deployed in house it could be a nice way to see if the code you want to write already exists in a similar function elsewhere (and therefore perhaps should be refctored to run in both places). It might also catch copy pasters before they ruin a code base too. But otherwise yeah, shitty SO bot.