That's part of the complaint. The main complaint though is that it's harder to verify the source of the source because it's nonstandard for your distribution. I

That's part of the complaint. The main complaint though is that it's harder to verify the source of the source because it's nonstandard for your distribution. Ideally, if you're building on a Debian derivative, anything you install comes in through apt-get, with a signed package. If you're on Red Hat, yum. And so on. RVM is not only unsigned, it brings in considerably things to do than apt-get install.