A very lengthy but simple and effective strategy to wipe out any unwanted record. Anyone can delete their past posts which is not wrong but the way the whole things were done, it was not usual. It definitely is questionable. So questions were asked, we had our speculations too.
I don't know to what extent the moderators of the local Russian board may be in cahoots with him, as you and Gazeta suggest, what is clear is that Ratimov's behavior is quite suspicious and so far has resulted in a few DT1 distrusting him. Those are many, too many deleted threads, and Mr. Switzerland putting him on ignore for it, opening the quoted thread, gives a lot to think about.