This will not handle cases other targets than $HOME. The automatic deletion seems also very risky. In my own script, I move all pre-existing targets to a separate directory, so I can check later.
You can set the source and target directories to whatever you'd like, this is just what I need for my own use. The automatic deletion is for directories, to prevent recursive symlinks. Of course, you can program your own however you wish, maybe add a confirmation step before removing and/or create a backup beforehand.
