Too late.....
Playing devils advocate here......
If you own a msartphone, have an online presence, use a supermarket loyalty card, then i think you have to accept that you are consenting to surrendering at least some of your privacy. And if you have been doing the above for anumber of years already, it's probably too late to stop your details being logged if not looked at.
That being said, I don't think Government should be able to slurp data on the industrial scale that it appears to be doing so at present. It's equally not defensible to suggest that it's soley to combat "terrorism". As the very definition of "Terrorism" can change. Today it's largely inferred to be Islamist terrorists. Tomorrow it could be you or I, simply because we don;t like the current government of the day.
Can't see that using encryption is going to be worse than sending traffic unencrypted. Yes it might flag a trigger, but unless they demand to nsee your private key they won;t be reading it.
Also, I think considering just how far removed from sanity and democracy our respective governments seem to be moving, people like Brad Manning and Ed Snowden are more important than ever before.