If someone states that they plan to use a weapon as a means of self-defense, how is that intending to break the law?
It is not against the law for someone to use a weapon in self-defense, or to state they they intend to use their weapon in self-defense.
The anon was saying that he would defend himself from being injected with a substance that is potentially lethal.
A person has a right to defend themselves from being poisoned.