Whether this is a troll or not, I'd be interested in actually buying one of these some point in my life. Think about all the pranks you could pull off. And the fact that they're not in use anymore bothers my trolling-buds.
I am certain its not a troll... I own 15 of these 100trillion notes, and know that several have been sold through this forum over the past year or two. Just a fun collector's item, and a great teaching tool on inflation.