And like Skip (I think it was him anyway) said, you don't really want to back yourself into a corner before you expand. Do you really need to wait until you're turning people away every day and have full capacity and then take years to build a new park to spread out those crowds, while having no new rides in the first two parks since you used up all the expansion room there too? I can see why some might see it as a bad idea, but they really need to be proactive and not reactive. Don't wait until you're backed into that corner.