Yes, we could do that. However, consider that authors would then be unable to utilize "Dead Ends" as part of their style. I like giving authors the ability to do that; perhaps they don't want "you die" pages to always link back to the beginning.
What I'm thinking of doing (hence, why test data are required) is programmatically testing to see if a path exists from the START PAGE to an END AND LEAVE COMMENTS link. If no such path exists, then the storygame will be restricted from being published.