Disable or hide "Unregister"

ROFLMAO.... That is an awesome question that if we answer it will guarantee you the perception of customer retention.... To bad you can't lock them on the site and feed them bread and water too... Is this like, an internet prison?

Sorry, this has me laughing my behind off....  And just for that great laugh I'll answer this for you....

admin=>Builders=>Navigation Menu Builder=>

Under the "My Account" column

Left Click on "Unregister" & drag it down from the "Active Items" Field to the "All Items" Field.

Now you have captive members!