I believe you used to be able to mine them with silk touch when it was first introduced, but not anymore. And pistons don't work on mob spawners either.
Rollback Post to RevisionRollBack
"Until philosophers are kings, or the kings and princes of this world have the spirit and power of philosophy, and political greatness and wisdom meet in one, and those commoner natures who pursue either to the exclusion of the other are compelled to stand aside, cities will never have rest from their evils." -Plato
That would make minecraft fun so hardcore players will protest it. And also. It's too much work for mojang. Waaay too much work. You have to input 3 lines of code and that's just way too hard. Why would you want them to do all that work? That's not reasonable, man.