A couple of articles on the Internet about how to block specific application permissions refer to some app called MoboClean.
It doesn't seem very popular and well-known trusted-by-users app so I wanted to ask for some more expert opinion about how safe this app is (it's not open source AFAIK) and whether should I bother installing it at all.
Moreover, it's not provided in the android market; you have to download the apk yourself and install it manually, which leads me to additional suspicion.