I agree, but developers have enough on their plate and knowing how to administer your workstation isn't the same as administrating a server.

That said, allowing user system wide installation could be possible. I think, at least under Linux, combining selinux and cgroup to provide sandboxed system wide user install could be possible but you'd possibly need to bypass classic unix directory ownership and permissions. That might require to much work or not even be impossible.

Anyone here with enough knowledge to confirm or refute my feeling ?