The R-Pi posse will round them up...
Usually you can report to the site that's hosting the video etc... Blogs and the such-like are easy to report if they are hosted but if they are hosting the site on their own server it can be more difficult.
However, it can still be done.
You can search for the domain (website address without the extra stuff after .com etc) on sites such as http://www.whois.net
and you will get the details of the owner... But reporting the site to the owner will do no good, because the owner of the site is the one putting the scam online (if they are hosting it themselves). Also sometimes the record will have privacy protection... Again action can still be taken...
Look down to the "name server" if you can not get any real information from the domain registration records.
You will see entries like "ns1.somehost.com", this will often mean you can go to "www.somehost.com
" and you will be at the website's host company. You can then complain to them *nicely* and give a link to the site they host. Usually, the host will have no idea or connection to the user who is paying them for the site so don't vent your spleen at them