Great tool, but why delete in the first place? Even if someone deletes all of their posts, the data remains in the archive and ninjastic. Anyone can type your username and look up your previous posts.

OP, can you make a script that can delete personal messages? The script should have an option to select a specific user and date range. From which to where you want to delete. It might be very useful. Especially for those who get thousands of PMs every day.