I like how you don't have an option to shut down your project to help clear those links from Google. Either you keep it up to date or SF will "step in" and do it for you.
That's the whole point of open source. If a developer abandons a project, someone else can pick it up and keep it going. And if you disagree with some of the developer's choices, you can fork the project and make your own version. Sourceforge is a great example of how someone evil can take advantage of the features of open source to do bad things.
I'd amend that to "someone evil who's built up a 'good' reputation for long enough that they dominate search rankings...." I don't know that what sourceforge is doing is a unique situation, but it's AFAIK not a common one. It's not going to have the same effect if I start bundling open source installers with malware and hosting them on my own, for example.