And curiously, mobile phones were used to promote concetrations against the goverment´s manipulation of the information.

Indeed. The mediatic, decentralised bottom-up response by the Spanish people to the attempts at mass-media manipulation has been a positive reaction to a terrible tragedy.

This rather laconic post was a way of highlighting the sadness of how the tools of our everyday living can be turned into deadly instruments.

But tools they remain nevertheless,capable of kick-starting both positive and negative outcomes, as you rightly point out.