@hehafner & others,
Whole hardly agree with plugin bloat--either using an additional plugin or modifying an existing one. It's interesting to see the plugins that some of the hackers' bots search for in the 404 list. I suspect they are looking for sites that have plugins with known security holes.
The 'self-cleaning' claim came from WF. Hadn't heard of a plugin that moderates its tables and self-cleans either, but it is something the plugin is designed to do (but isn't).
I mention table bloat because some readers use Bluehost, JustHost, and HostMonster (all EIG owned). They are decent virtual host companies but have gotcha's that most customers don't know about. For example, a basic account allows unlimited websites except that the aggregate number of DB tables cannot exceed one-thousand. Important stuff if your thinking of installing multiple WordPress sites heavily burden with plugins or a few Drupal sites (that install over 300 tables per site just to start).