It is a complicated situation.
I am not saying they are all liars, but who do we trust here? Casino that has made the accusation or player who has been accused.
In these cases whenever I read them on the forum, I trust no one as I cannot conclude who is right especially when I do not have all the facts and details. And it is not possible to have all the facts and details. I usually leave it to the both parties or their mediators, if any, to sort it out.
What exactly is multi accounting? and is it that some gamblers do not know when they are defaulting on that? Asides opening multiple accounts in a casino, what else can cause it because the gamblers are always claiming that they do not have another account, and the casinos are not always providing proof of the other account when they make the accusation.
One of the most causes of multiaccounting which looks harmless but the user can be punished is when the user opens an account using a public wifi or a public computer like in a library, or an airport. And then another person comes along to use the same wifi and computer for the same purpose. While the user may not be away of what he has just done, the casino will not even ask for an explanation. And they will ban the account.