Be careful if you don't have explicit permission, even if you're just searching for real names on a website. I know that it's morally correct what you're doing, and that it should be allowed to help poorly secure companies like this, because in some cases these entities actually sue the people trying to help them, and later on get compromised by those that doesn't want to report what they've found / abused of course. (These other entities being e.g., blackhats.)
In the information security business of companies, some will take it extremely personal as an attack on their public relations image, even though they should in fact be glad that a named or unnamed researcher, has helped them fix a real or potential vulnerability, that e.g., a script kiddie could've abused, and all of this help they got, was for free, I don't see the point in sueing. Anyway, I should note that some companies, are more than glad to get this kind of help, just be extremely careful if you're going this path.
Of course if it looks like you're blackmailing them or you're trying to sell services this way, then there's a higher chance of getting in trouble, because it will definitely seem like you're trying to force them to buy your services.
So if you absolutely must, go on the safe path anonymously, and never make it look like you're blackmailing them. Always point out you did it entirely free, and that you only wish to see the Internet generally more secure.
I should of course state, that this site is called the ethical hacker network for a reason, not the morally correct hacker network, just a note so I don't get in too much trouble for writing my own personal opinion because of the freedom of speech
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