The real "problem" with filling worlds begins in the fall. Baseball is ending, football is starting, school is back. This will also be the time any world created now will roll.
Will the sky fall? Unlikely.
Will more worlds sit for a longer period of time? Yes.
Do I think this is part of the alias issue? Yes. Owners get tired of waiting. They create a new username, perhaps innocently, and ask to join. Desperate commishes take them in. Then lines start getting crossed.