It wouldn't solve the main problem we're discussing
Actually, now that I think about it, it would increase the cost of doing this without giving yourself away, since now you'd need a sockpuppet to downvote their replies to you.
One potential problem is that you could frame someone, but it would be fairly easy for them to clear their name.
Below is a message I just got from jackk. Some specifics have been redacted 1) so that we can discuss general policy rather than the details of this specific case 2) because presumption of innocence, just in case there happens to be an innocuous explanation to this.
So... thoughts? I have mod powers, but when I was granted them I was basically just told to use them to fight spam; there was never any discussion of any other policy, and I don't feel like I have the authority to decide on the suitable course of action without consulting the rest of the community.