From: snacktime <snacktime@...>
Date: 2006-08-30T16:23:24+09:00
Subject: Re: $SAFE =4 safe enough?

There really isn't anything you can do to make this safe.  Even $SAFE
itself can be set to a different value from the usercode.  Plus ruby
threads aren't real threads, so I think someone could just fork off a
new process, or at the least it would be easy to lock up your whole
application by calling some blocking operation that takes forever.