Thank you for the suggestion. For a while Dreamweaver didn't work with server side code in behaviors. I think that functionality was last tested on DW MX 2004, so it is possible we could re-address that limitation in an update if DW works properly now. We also have a bit more experience now, so we might be able to pull something off. I will log this as a feature request to be considered with the next update.
This is actually a limitation in Validation Toolkit, and not Security Assist for those who may be confused when reading this.