Sourceforge did this to me a few decades ago. I had created an open source project and was leading a group of developers. I told my group I'd be out of town for a week on vacation. Some members decided they wanted control of the project so they told sourceforge I abandoned it, which wasn't true of course. When I got back, sourceforge wouldn't hand control back to me. It turned me off open source to be honest. At that point I backed out of any other projects I had founded or was participating in. I then dove headlong into proprietary software as a career.
You can argue that it's open and one should be okay with that kind of behavior. But, imagine if Linus lost complete control of Linux, repository, websites, mailing lists and the group and was pushed to the side. We wouldn't have Linux today as we know it.
You can fork if this happens to you. But, the team members who wanted the project could have forked. They only performed a takeover because they wanted power and all the spoils of the effort that went into building the group, website, the name, developers, the claim of being the original project, social connections and user base. They also wanted to erase me from the history of the project. I was wiped out of the AUTHORS file. They had control of the blog entries, its message and direction of the project. It is dirty, underhanded and I am sure I am not the only one who it has happened to.