[Q] Intellectual property on NS?

[Polish Prussian Commonwealth]

Let's say, hypothetically, I made a map. Someone else on Nationstates stole that map without properly giving me credit.
Would that be an issue, and what actions could I take against the person who stole my map?

[Sedgistan]

Yes, if you were bothered by it and reported it. See this part of the OSRS, specifically under Copyright.