It's (1). The is a negative imperative particle, since (= Quotative + ) follows an imperative phrase or sentence.
Imperative phrase/sentence + is an expression for saying "( _lit_ ) It's unreasonable to tell me/us/someone to do~~." i.e. "You can't expect me/us/someone to do~~!", implying "Of course I/we/someone do/can not~~."
>
> ( _lit_ ) It's unreasonable to tell me not to feel disturbed/uncomfortable, isn't it?
> → You can't expect me not to feel disturbed/uncomfortable, right?
> Implying: "(If you keep talking to me / calling me so many times, then) I will feel disturbed, of course! / it's quite natural that I should feel disturbed!" (≂