Behavior of apt-get autoremove with arguments

I'm using Ubuntu 12.10 dev with apt 0.9.7.5ubuntu2. As said in the other ticket (https://bugs.launchpad.net/ubuntu/+source/apt/+bug/667468) it is not documented that apt-get autoremove does take any arguments. Let's see what happens if I try to remove a package which has 1 or more dependencies which are not recommended or suggested by other packages (normally every system has many of such packages): "apt-get remove filezilla" will try to remove filezilla but it also gives me the information that the packages "filezilla-common libtinyxml2.6.2 libwxbase2.8-0 libwxgtk2.8-0" are not needed anymore. "apt-get autoremove filezilla" will try do remove "filezilla filezilla-common libtinyxml2.6.2 libwxbase2.8-0 libwxgtk2.8-0". Now there are 2 possibilities:

1. apt-get autoremove doesn't take any arguments and should show an error if there is one.
2. It should be documented that "apt-get autoremove PKG" is like "apt-get remove PKG; apt-get autoremove".