Nobody says that all complaints are made by one person (every casino has some kind of complaints), but it's hard not to notice that there is a way of similarity between many (I think that even most) of them.
The fact that they appear here almost every day is simply an illusion, because someone has created a dozen of these accounts and use different one for each day of week. Check that each of them has the same complaint text in the history of posts and often over 30 - 40 same posts in history.
So one person decided to make different deposites on 1xbit very well knowing that they are scammers and then once their money was scammed they decided to create several bitcointalk account complaining about their different accounts getting locked up. Wow this has to be the most delusional excuse i have seen this year so far.