Further to the "Entrapment & Exposure" video above ...
One thing to remember, is that some free email services, Hotmail being one of them, actually recycle email addresses (!). So the fact that someone is able to sign up with a certain address doesn't mean that account never previously existed, it can simply mean it was abandoned.
Another thing to also be wary of is "homoglyphs" where people use accounts using characters that visually appear to be the same as others in order to give the appearance they come from an account that they haven't. Be wary of anyone you communicate with, especially on this "hot topic" if you haven't previously corresponded with them. Try to confirm with people through the channel you know them from (e.g. if a Twitter account emails you rather than messages you through Twitter). Also, never, ever, forward anyone else's information to a 3rd party.
It's kind of sad and shocking that someone would impersonate a CSA, but hey, they support Lloyd, so they are not really top of the morality tree now are they?! The only real question is why they feel the need to do this, because IMO it demonstrates that they believe Marko is real that they are trying to identify him (in which case, why are you supporting Lloyd - isn't it's even more bizarre and immoral to do so?!). The 2nd question is whether and how closely they are associate with Lloyd himself.
Things that make you go "hmmn?" !