Comment You can't, and that's the problem (Score 4, Interesting) 172
That's the problem: you can't shut down a SourceForge project. If you try - if your project is popular enough - they will "provide a service to the community" by mirroring your new project page. With ads. And malware.
They've found a way to abuse open source. Precisely because it is open source, they can create a mirror. The only thing that will stop them is publicity - like this has been receiving. I assume that most techies stopped going to SF a year or two ago, when they started with the malware wrappers. Anyone who wasn't put off by that, will surely now be put off.
I would actually prefer that people not all go to GitHub - it's already getting too big and too influential. Bigness seems to inevitably lead to evilness, sooner or later. It would be better to spread hosting around on many different services. We then just need a couple of central directories that say where a particular project's homepage is. If a directory turns evil, that's easier to replace than a whole hosting service.