> 
> Is an account on RubyForge something that could be 
> programatically generated 
> via scraping and email handling?

Yup, definitely. 

> If so, perhaps a (reverse) captcha would help.  

Yup, that's the next step.  Will require some GForge twiddling, though.

> If not, well, 
> there's nothing 
> you can do to stop a determined individual except ban their email/ip.

Yeah, I guess that's the next option.  Ah well, we'll play it by ear...

Tom