Ender Portal Breaking

On Blood & Iron, you may have noticed that some people choose to lock up Ender Portals. Why do they do this? Well, it's simple because on Blood & Iron Ender Portal's are able to break with about 5 TNT, and because how Minecraft world generation works this means that only a certain amount of End Portals are available because the world has a border of 60,000 blocks (By Default) This means that if you come across an End Portal, you can choose to either preserve it or destroy it so that other people don't get into the End.