We didn't experienced any blunt ghosting yet.
Some men got their life's circunstances changing fast and that seems to be the main reason for stopping to come by. But in those cases there are conversations and amicable endings, so the door remains opened for future meetings perhaps.
There is, of course, the collector type-of-guy. It is usually a man which is doing it good with many women that just keeps meeting and tasting more "flesh", so he stays around for 3 or 4 times and is done. We met a few of this type.