The dark side of Gmail

Of all the time I've been using Gmail, it finally bit me on the ass:

This account has been locked down due to unusual account activity. It may take up to 24 hours for you to regain access.

Unusual account activity includes, but is not limited to:

1. Receiving, deleting, or downloading large amounts of mail via POP in a short period of time.
2. Sending a large number of undeliverable messages (messages that bounce back).
3. Using file-sharing or file-storage software, browser extensions, or third party software that automatically logs in to your account.
4. Leaving multiple instances of your Gmail account open.
5. Browser-related issues. Please note that if you find your browser continually reloading while attempting to access your Inbox, it’s probably a browser issue, and it may be necessary to clear your browser’s cache and cookies.

If you feel that you have been using your Gmail account according to the Gmail Terms of Use, you can troubleshoot your problem by clicking here.

And before you ask: no, no, no and no. I was trying to figure out why our e-mail lists weren't working and it looks like I won't be able to.

Up to this moment I hadn't one bad thing to say about Gmail. I'm...deeply disillusioned right now.

Edit: Left feedback, account reactivated minutes later. Excellent response time. Fully reillusioned.

Re-edit: Locked out again. Gyuh.