Function keys and workspaces

Some time ago there were a couple of enquiries about whether there  
was a way to disable the function-key shortcuts for workspaces. I  
never saw a response.

I'm desperate to find some way to do this. It makes me scream when I  
hit a function key by mistake, or thinking it'll do what I use it for  
in other applications, and suddenly all my OW windows disappear and  
completely different ones start loading.

PLEASE can we have some (hidden if necessary) preference for turning  
this tiresome feature off?

Thanks
Mike