A short pull-down list would work well: Spam, Harassment, Site ToS Violation, Thread/Group Rules Violation, etc.
This way you can automate rules like: if an article get's N spam or harassment reports it's put into the review queue and hidden until a Moderator can review it.
Having watched the video, the visibility conditions were very poor, any driver would have had trouble at the speed the vehicle was moving (arguably too fast).