I just want to let you know that WhoisGuard is a service used by millions of domain name owners to protect the identity of the owners of the site.
I'm speculating here, but it seems to me that any operator of a gambling site accepting bitcoins would want to protect their identity to some degree. Why? There's numerous obvious reasons but I'm sure the most important is they do not have the proper licensing to run a gambling site; there is no need to reveal their identity; profiting from running gambling games in jurisdictions where gambling is illegal is a crime; they may not report earnings or want to pay taxes on their share of the profits.
http://www.whoisguard.com/ - shows an example of a protected email contact and registration data.
Your concerns could be valid, I can't say with certainty that nobody is cheating on any of the sites, but your evidence is non-existent. In fact the evidence you present only demonstrates that the people operating these sites are smart enough to not put their real contact information on the domain.
satoshidice has a private whois, coinroll.it has a private whois data, etc.
The only thing interesting is that they were all registered through eNom. But eNom is a TLD reseller, so technically the sites could be registered through other services that resell domains through eNom or there may be some other valid reason.
I guess the bottom line is that if you're going to invest your BTC in an enterprise that operates in the grey market at best, you have to trust someone. If you don't, don't invest.
