Hi!
If you could just freeze or slash someone’s balance, there would be a big “bloodbath” very soon. Polkadot is not designed in this way. As far as I know, only the referendum killer is able to slash someone else’s deposit, but it can only slash the deposit that the submitter has made when the referendum is submitted.
It is not possible to trigger a vote to have the system freeze or slash a particular wallet’s balance.
Michiko is already out of Ambassadors, she has done no harm, she has just left an excellent precedent of what happens when someone with a fake identity applies to the Ambassador program. I think we have no further business in this matter, but I respect your comment.
See ref. killer here: Polkadot OpenGov Origins · Polkadot Wiki