SF has been known to tamper with people's stuff, so I don't trust it. As far as I know it's only binary installers but still, nothing stops them from modifying source code too such as adding a small blurb to download and run spyware or something.
In fact we have history and with our git clones we have the original history in many different places.
So if they try to re-write the svn history we'll spot this pretty easily.
Being too paranoid is counter productive...
Oh ok so it is actively monitored for changes? That's good to know then. I might give it a try then and just install from source.