I'm no fan of Facebook but I have a hard time understanding why Facebook is singled out for this. If what FB did is illegal, then they can be charged for their crimes.

However if we're critizing from purely a moral standpoint, how is this any different than claiming that cell phone carriers should be preventing this type of thing over phone calls or texts?

For the record, I don't find that to be a convincing argument either but it's the inconsistency of perspective that irks me.