I'm curious: what could the FSF have possibly done to earn your distrust? Have they ever lied? Have they ever hid their intentions? Have they been factually incorrect on a particular issue? Or did they made predictions that haven't realized? Or did they act like jerks? (This one doesn't count in my book.) What happened? (I'm serious, I'd like to know.)
Thinking on an answer, I realized that it is not that I don't trust the FSF, I just don't care much for their actions anymore. Their intentions have been devaluated by the actions and comments of RMS. Everytime RMS gives in to its tendency to destroy more than create, the FSF looses value for me.
And this is obviously my opinion. I know a lot of people believe the contrary, and that is ok. Everybody is allowed to have an opinion.