To answer the original point of this question. To my knowledge there has been no change in the rookie greefing policy, the knowledge base will likely show a new time stamp because the article was updated. This may very well have just been the addition of a full stop.
If you want further clarification into the policy you should file a support ticket as the clarification should come from a Game Master.
As to the idea of markers in rookie systems, make the suggestion in #technology-research:player-features-ideas as this is where CCP would likely notice the suggestion.