"Hard" is a relative term. There are over 5000
DVC villas at WDW now and Moonlight Magic events simply do not have enough capacity to accommodate the occupants of all of those rooms. During the advance registration, many, many people will get in. Some will not. The general registration for those who do not have a hotel room goes quickly and has very low odds for success.
Since they are registering for 3 events simultaneously on September 19, some will probably have to wait up to an hour to complete registration. Some will register immediately, but others will have wait for the queue to progress.
Telephone registration is not available. It is all done through an online virtual queue. Each person in the waiting room will be given a queue number. The number will count down as registration gets closer. When your slot opens up, you'll have limited time to get registered before it kicks you off or the event reaches capacity.