Facebook will either be killed by something fundamentally better - or it will be regulated to death.
Social networking is emerging as far too important a communication medium for one company to be allowed to dominate. It may take a few yeas for regulators to catch up, but if Facebook isn't unseated by something better and more open, it will get broken up by government or at the very least forced to inter-operate openly with its competitors.
I'm betting something better will come around before the government steps in, but either way I'd say Facebook will be taken down a peg or three within the next few years.
You have the weird assumption that government works for the people. In fact, government will likely help Facebook extend their monopoly in return for easy access to all the data that facebook collects on you.
If you use facebook often, especially from a mobile phone, then you are leaving a data trail for everything you are doing in your life, and everything your friends are doing. It is easy to apply that against you if needed, which is why a government will be happy to support facebook.
Social networking is emerging as far too important a communication medium for one company to be allowed to dominate. It may take a few yeas for regulators to catch up, but if Facebook isn't unseated by something better and more open, it will get broken up by government or at the very least forced to inter-operate openly with its competitors.
I'm betting something better will come around before the government steps in, but either way I'd say Facebook will be taken down a peg or three within the next few years.