I don't think this is against the rules. The "attacks" that he is threatening are attacks against altcoins and this is allowed. If he was threatening bodily harm against a person then that would not be allowed.
He is essentially exposing the flaws in your shitcoins.
The forum operators have little interest in protecting alts or banning long standing users, no matter how childish, pathetic, or evil they are.
I would be amazed if any of the admins ever see this thread even.
I am not sure why they would have any interest in protecting altcoins? I hope you realize you are posting on
bitcointalk.org. If you were posting on altcointalk then the mods would probably want to censor potential vulnerabilities about scamcoins more.