Yes, they should be prosecuted for treason. Today’s headlines might allow the enemy access to sensitive information which could lead to the death of agents, the planning of murderous attacks, etc. It’s about time the news outlets showed a little gratitude to the country which allowed them to exist and prosper by keeping their secrets, even if the providers of same could not.
But how do they know it’s classified? I guess if they get a copy of the document with the TOP SECRET stamp on it, OK.
But if it’s just an email, how would they know?