Moby's right. Always remember to put safety before play. I'm not sure whether the Library has something similar to this, but here's a link to a page on safety a friend sent me.
Safety First - Fun Second
There's a link on that page down towards the bottom to give a little more guidance on what would really be nice to leave for someone in case of a safe call. Paranoid, hmm... maybe just a little. But I'd rather be paranoid than let someone take chances with his life.
- Mark