Responses on craigslist to get your e-mail
When you get responses like :
Is it still available?
Your title in a return email ?
Then do not response on it. It is just a way to get your email so they can send you spam.
One of the domain names used for this is :
Fiatio.com
Created 15 hours ago! (7/8/2012) Registered with dynadot.com
You can send a complain to:
privacy@dynadot.com