This is the tactic I am using with the crazy HOA toxic person. She has been writing these long e-mails and asking questions at HOA meetings that clearly we can't answer (or answer well enough for her) so we have composed a long e-mail back to her and, at the end, ask if we can share it on the condo website. Since one of the things she complained about was communication.

Once we make this long response... we won't take any further questions from her. And at the annual meeting we are going to get rid of the open forum and request that everyone put in their questions via e-mail before the meeting.

The Board wanted to not respond at all - all along but I suggested to them that would be a mistake. Then she would have an issue. But if we responded and posted it public --the Unit Owners could decide for themselves.