Should you publish a email directory of all users on webpage

We are rolling out a new website.  Management has requested that we put a directory of every email address of all of our employees on the site.  I am hesitant.   I am concerned about spambots and spiders, as we have a very small staff, and don't have a webmaster on staff, I know there are ways to prevent it somewhat, but I am afraid we don't have the resources to stay on top of it.  Can anyone give me pros and cons of this, or point me to articles discussing this.  I have looked myself, but I think I must be phrasing it wrong because I am not finding much.