spam

Here is an example on how to obscure email addresse (or other tekst) using http://drupal.org/project/signwriter in a formatter. You can use it on the cck field overview as a formatter (or in display suite).

This module turns dominique@dominiquedecooman.com into

<a href="mailto:&#100&#111&#109&#105&#110&#105&#113&#117&#101&#64&#100&#111&#109&#105&#110&#105&#113&#117&#101&#100&#101&#99&#111&#111&#109&#97&#110&#46&#99&#111&#109">

The code in the module can be found on http://drupal.org/node/151638
I just putted it in a little module ready to be downloaded and installed.