The content actually encourages players to server hop and it's been created with world visit in mind, hence why contributions to other worlds are possible. Reporting players for using a valid feature in the game isn't exactly the best way to go about it, don't waste GMs time on something so silly. However do raise awareness with thread(s) in the forums so devs are fully aware of any on going issues. It's not the players' fault for congestion, but SE for not being better prepared.