Spam Bots - Require email validation - how to tell who has or hasn't validated

I started using email validation rather than administrator approval to grant users access.

I'm still getting a handful of users per day that get through the captcha but that was to be expected.

My intention was to periodically go in and delete users who have gotten through captcha but never validated since they used bogus or stolen email addresses.

The problem is the the 'People' view doesn't differentiate to me those who have or have not yet validated.

Am I missing this somewhere? Another screen or query maybe?

Thanks