First off, I am glad that WU was able to help you and stop the money from going through.
Second, the reason that you would not be able to sue roommates.com is that they did not do anything wrong . . . it was the scammer who was using their site that is the one who wronged you.
If you would like to try and do something to bring attention to this scam and try (like many of us here are) to warn others before they fall victim to the scam this is what I would suggest you do.
Now that you have that letter ready . . . join our letter writing campaign to try and bring media attention to this scam.
Send detailed story with full contact information to
ABC News
7 West 66th Street
New York, NY 10023
And
Caroline Mayer
mayerc at washpost.com
Also, since I personally get many emails and phone calls from media across the country, if you are a victim who would be interested in speaking with the media please send me an email with the following information.
Subject: Scam Victim - (name of the state you live in)
Information to include:
Your name
Your COMPLETE mailing address
Your daytime phone number
Your evening phone number
Your email address
Thanks!