Mob Spawners are very, very valuable. Not only are they a great source of XP, but they also provide stuff to sell in your various shops (Spider Spawers for String and Eyes). However, wouldnt it suck if some jerk came along and broke your spawner that you worked so hard to find? Here is my idea. You implement some system that allows you to protect one spawner. And only you are allowed to break that spawner. This would allow people to feel like make XP trap in the Wilderness worth it. Just an idea.