I like to use zsh's named directories feature to move about my file system quickly (e.g. so I can use ~src to switch to my source code directory).
I also like zsh's auto-completion features.
However, I work in an environment with a large number of users, so when I type "cd ~s" and hit tab, I get a huge number of possibilities completing to match all the users starting with s, instead of completing "~src".
I don't really care about completing usernames (except maybe my own, but I can live without that) in this environment. Is there a simple way to disable this, but still keep expanding named directories?