When installing Bazel for the first time, I made the fairly obvious mistake of omitting the "--user" flag. The error I got back suggested I should use "sudo," which I did. Since I don't seem to be the only person to make this mistake (cf the title of #962), perhaps if the installer is about to error out due to insufficient permissions, it would be better to say something like:

If you are just installing this for yourself, use --user, but if you would like it to be accessible to everyone on the machine, ensure you have access to...