I use Meebo simply because it’s a webapp, and won’t slow down my computer too much. For some strange reason, Meebo thought it would be a brilliant idea to make chatlogs public to everyone. A simple search with some keywords will bring up plenty of results.

site:http://chatlogs.meebo.com/ "keywords"

And all that stuff will be brought back. You can narrow things down as well if you add a separate “username” part to the search. While you can’t see the usernames straight out, a simple View Source will solve that, which makes it even worse. Digital records are great, but only if you’re the only person who can see them.