This wasn't necessarily a person. I can think of several ways a "random" node might be accessed "suddenly":

1) Search engine: your site may have gotten exposed in a variety of ways and the search bot is back to re-index.

2) Internal search: occasionally, the internal Drupal search function will re-visit a node, particularly if it was a PHP format.

3) Hackers could have picked up the IP, or even accidentally discovered it.

I wouldn't worry about the first two at all. The third thing is going to happen sooner or later, so be ready.

Nancy

Injustice anywhere is a threat to justice everywhere. -- Dr. Martin L. King, Jr.

From: Anthony <tony@tony-mac.com>
To: support@drupal.org
Sent: Monday, April 30, 2012 12:17 PM
Subject: Re: [support] Strange characters in source of block

Thanks Earnie.My site isn't actually live yet so it's address is a numerical url. I only publicized that here once months ago. So what was this person doing trying to access random nodes I wonder?