The fact that it reported "hundreds" (if the author is right about that, he might be misremembering) of permissions-related errors tells me that it was trying t

The fact that it reported "hundreds" (if the author is right about that, he might be misremembering) of permissions-related errors tells me that it was trying to clean up hundreds of files. Sure, not knowing what's in the script, I can't say for certain that it wouldn't have missed something... but it sounds like it was trying to be thorough. And it was written by the people in position to know what needed to be cleaned up, so I actually have no reason to assume that it wouldn't have removed all traces.