This is not safe.

Running as a normal user, I also got segmentation fault, strace told me it was because of lack of permissions to a sysfs-file, so I ran it as root.

Instant system lockup and after a reboot, my ethernet controller was broken.

Rebooted the system, no change.

Powered off the system, removed power cord, let it be for a while, powered on.

Took about 15-20 seconds until it started after powering on, ethernet controller back.

Tried again with another fglrx, same freeze.

I have yet to be able to get the computer to boot (even just spin up the fans before bios).

The power led just keeps blinking and sometimes manages to start spinning up the fans until it dies again and get stuck in a loop.