Yes I noticed this also, it’s been happening for years and it’s almost always a new account and that’s why it’s hard to take them seriously.
It's always a new account because they register on Bitcointalk when they have a problem with casino. In fact, they aren't the members of this forum, they only register to solve their problem with the help of DT members.
And they fall down to the forum probably because of their desperation. But not all of these newbies have a legit concern.
They are writing a long story on how they have been scammed or they've been not allowed to withdraw. While I've seen successful disputes but it's that most of them were losers that can't accept it.
They're coming to that point because they think that it's going to give them a refund with their losses.
Newbie or Jr Member accounts are always to be taken with a pinch of salt we can reckon. You can see out there users who are newbie but obviously have a good degree of understanding of the forum and make comments that are relevant and reveal knowledge. These are usually secondary accounts, but other are simply open for accusation as you say and will not carry much credibility.