One of the things I would do is make people accountable. Introduce a system to track all your records (Just like your ssn here).  Make a way to link all your criminal/ financial records . Based upon that, there would be a background check for any jobs, either in government or private sector.

I believe students do stupid things becasue there is hardly any bad consequences. If getting a criminal record would hamper their future, everyone would think twice beofore organizing another protest or committing any fraud.