Is there a way to delete my entire collection?

[yancakes]

For various reasons I haven't been keeping up on my database, and for various reasons it's easier for me to just start from scratch than it is to go through item by item and figure out what I still have and what I've added.

Failing that, what's the most convenient/efficient way to mass delete stuff?

[masamune]

You could delete your account and start a new one. It is too bad there isn't a multiple delete option yet.

[jason]

For various reasons I haven't been keeping up on my database, and for various reasons it's easier for me to just start from scratch than it is to go through item by item and figure out what I still have and what I've added.

I've taken care of this for you.