Recently i have hit by some spammers which create multiple accounts and make many spamming comment.

To remove those accounts, I have to delete them one by one.
For account administrative page, you are only allow to active or inactive but no delete.

http://img1.uploadscreenshot.com/ima...3712200029.png

For comments there are no such option available

I will suggest allowing collective delete, inactive for
- Accounts
- comments