I run a website that generates life insurance leads. The site is very simple a) there is a form for capturing the user's details, life insurance requirements etc b) A quote comparison feature

We drive traffic to our site using conventional Google Adwords and Bing Ads campaigns.

Since the 6th January we have received 30-40 dodgy leads which have the following in common:

1. All created between 2 and 8 AM

2. Phone number always in the format "123 1234 1234'

3. Name, Date Of Birth, Policy details, Address all seem valid and are unique across the leads

4. Email addresses from "disposable" email accounts including dodgit.com, mailinator.com, trashymail.com, pookmail.com

5. Some leads come from the customer form, some via the quote comparison feature

6. All come from different IP addresses

7. We get the keyword information passed through from the URLs

8. All look to be coming from Bing Ads

9. All come from Internet Explorer v7 and v8

The consistency of the data and the random IP addresses seem to suggest an automated approach but I'm not sure of the intent.

We can handle identifying these leads within our database but is there anyway of stopping this at the Ad level i.e. before the click through.