This is actually why i took so long to launch the site. I've used the prototype version of this for a long time. The app is written in node so it is incredibly fast, like destroy the internet fast. That is why email confirmations are required and accounts are limited to 5 crons each. I will add a captcha on account confirmation shortly as well.
Google does something like this: http://support.google.com/a/bin/answer.py?hl=en&answer=6... -- their alternatives also include changing DNS to add a dummy TXT record.
haha I actually like that line a lot.
Describes exactly how I feel whenever I'm using node.
I appreciate your concern.
I appreciate your vigilance :)