There's a real, reasonable fear at the heart of this legislation.
If encryption becomes widespread and providers/individuals start using it correctly, then it will greatly hinder law enforcement's ability to gather physical evidence for certain types of crimes.
At the end of the day this is just another situation where we have to weigh the positive of greater freedom against the negative of the impunity this freedom may provide to those breaking laws that we all support.
I don't know what the answer is, but acting like anyone who supports this legislation is just after more control is immature.