Hello @haejin!
We at Utopian, as we have publicly stated, believe every affected user should review all of the given out votes and revoke them accordingly. While you were clearly the only real target and other posts were relatively random, we don't want to point fingers in one direction and ask people to review only the votes on your posts. We're happy to say that everyone should check every vote casted during that 1 hour period.
We're terribly sorry you were negatively affected by this incident! We hope you'll quickly recover from this unfortunate turns of events.