Thanks David!
If I understand correctly, the VRDB data is a snapshot of critical system files that would (or rather might) be needed if you had a virus infect one of the system files. Making a system restore point on occasion, might be better served than worrying too much about the VRDB??
Personally, I'm pretty picky about where I surf on the internet, and I NEVER open attachments unless I've first checked them out. Also I have settings in my email to read messages in plain text, and not to send read receipts as default.