Goofy Scientists Filling in Volcano With Cement?

I had to double check the link to make sure it wasn't on some joke site. This is why Scientists are morons and can not be trusted. I don't know what they are thinking. They actually believe that they can fill a relatively small Volcano with Cement to slow the flow of mud and gasses. Now "I Ain't Got No Fancy Scientist Edumacation", but I would think that if cement balls or material are "loaded" into an active volcano, happens to slow or allow pressure to build up, it will respond not long after. The ensuing eruption will mimic a shotgun blast of continental planetary proportions. They will end up making the muddy volcano deadly.