If many people have invested small amounts of bitcoins into a company that was not what the investor was expecting. Could these people get together and take legal action against the company if they could fund the legal fees through amounts smaller than their investments.
Nope, because most of those ponzis would be run by an anonymous person. There also have been lots of other scams in the bitcoin world , but its not easy to take legal action unless you know the real identity of the person running it.
The owner of the domain name can be traced!
Altough it's not that simple, you CAN buy TLD's anonymously (well... I know a couple company's that require your name and address, but never verify said information PLUS they accept bitcoin as a payment method)...
With hosting: the same deal... There are a couple VPS resellers that don't rely verify your entered identity, and accept bitcoin as payment...
Don't get me wrong: i hate scammers and chances are pretty good they fucked up at least once (it's enough to forget turning on your VPN when logging in on a server to get your real IP in a log somewhere)... So it's basically a good idear to check their domain registrar and hosting provider for a real IP, but a smart scammer would probably cover his tracks, no
