How to hide crumbtrail for all pages for a certain user-role on the Beta theme?

Hi,

I'm having some issues hiding the crumbtrail when using the Beta theme. I've managed to hide it for specific scenes on the regular themes, but can't manage to get it working for the beta theme.

Ideally, I'd like a piece of code to hide the crumbtrail either for all scenes under a single login page, or all scenes for a specific user-role.

Anyone have any ideas?