Still, the governments of the world have been asking us to give up on having any level of privacy so that they can "catch terrorists". I think they need to demonstrate some things before I can even think about accepting that idea.
1) There's oversight over the collection and storage of the data that guarantees that it's being used for that purpose. There's no possibility that it can be used for other law enforcement operations, for blackmail, or for looking at dick pics (thank you, John Oliver).
2) The program is effective. If you're collecting my SMS messages so that you can stop terrorist attacks, show me that you're catching terrorists that way. Don't collect SMS messages preemptively and then go, "Well after the fact, we found that the terrorists used SMS and we just didn't catch it. But after we caught people who were involved and found their cell phones, we thought it was kind of helpful to see those SMS messages."
3) Explain why the terrorists won't just change their methods. People say things like, "When guns are illegal, only criminals will have guns," and then the same people say, "We need to make it illegal to send encrypted messages that we can't break." It doesn't make sense.
That's just to start. I'll think about more questions when those can be answered.