But I would certainly trust the FSF not to change licensing terms (aside from moving to newer versions of the GPL/LGPL) to something unsavory, while the same can't be said of any old random project out there. I think that trust (or lack thereof) is the real issue. Ultimately, though, it's better to just not have to trust; I don't sign over my copyright to projects either, unless it's part of a job and the stuff that I write would otherwise be owned by my employer anyway.
