I can tell you that with the information we now have access to, we're putting far more pedophiles in jail than before. The current belief is that the number of them hasn't necessarily grown with the internet (though it has made access easier) but we can now identify them with greater ease (before it was an even more underground network used to exchange pictures and other material).
Global terrorism has certainly grown in the past 10+ years. Technology has allowed us to track many terrorist, understand their movements, gain insights into their operations, and stop many attacks before they happen. Without it, it's 100% certain that we would have seen far more lives lost and terrorist cells would be far larger than they are now.
So we must weigh things. Are we better off with or without such tech? It can certainly be used for bad but it's most frequently used for good. Is the loss of thousands of additional lives worth some additional privacy (which is silly to believe as the bad guys will still have access to these tools even if we block ourselves from using them)? Is it worth additional kids being molested, raped, and killed in turn for some additional privacy?
Sadly, we only see reporting on such tools when they're used for bad. We don't ever see reports touting how an iOS forensics tool was used to find a little boy who had been kidnapped and raped for the past 2 years by a pedophile. We don't see reports of how a forensic tool was used to help uncover information that lead to a terrorist training camp in Afghanistan which was preparing for an attack on a sports stadium in the UK. It's much bigger headlines (read: dollars) to report on when these tools are used for bad, as that sparks outrage which drives more traffic to these sites and more money for them.
