The conspiracy theorist in me wants to say Iamnotback is in deep with Theymos and is actually just deleting his own stuff, pretending to be attacked by the forum.
In the line of his own kind of conspirational thinking, that wouldn't be a bad move to promote his bitnet work, as a tool to fight the crypto establishment. This is the problem with conspirational thinking: you can give a conspirational explanation of about any event, and its opposite, and you always feel smart of "having seen through the smoke and mirrors of the evil and smart enemy".