Unfortunately, social convention evolves independently rather than being dictated. If convention evolves in the direction of Facebook events and newsfeeds instead of mass SMS invitations and e-mail, one is forced to choose either to use Facebook or to become a social outcast.
did you ever think about whether facebook's marketing and influences have an effect on this evolution? Its not like "society" can think for itself - its just made up of people.
It isn't evolving "independently" - its just the sum of the actions of everyone. So, to dicate it, you can attemot to convince your friends of the benefits of moving off it. If it is true that there is benefit form moving off, then it will happen eventually.
...oh except of course, if you get locked in, as designed.