they're tools, you don't ascribe trust to them. you trust or distrust the user of the tool. It's like say you trust your terminal emulator. And from my experience, they will ask for permission over a directory before running. I would love to know how people are having this happen to them. If you tell it it can make changes to a directory, you've given it every right to destroy anything in that directory. I haven't heard of people claiming it exceeded those boundaries and started messing with things it wasn't permitted to mess with to begin with.