I don't agree. If we are not allowed to defend ourselves from a clear takeover, what can we do? Why do you think it was wrong in the first place? If we didn't do anything, the chain would no longer be ours. Justin's actions clearly show he didn't have good intentions from the start.
Also, if what our witnesses did was illegal, why did Justin not just sue them as they were all well known, instead of attempting a clearly illegal takeover of the whole blockchain, and then blaming "hackers". Now he has not only lost the chance to use the law to his advantage, but any good will that might have been to his advantage on winning the hearts of the users (the lifeblood) of the blockchain.