It’s often the case that new technologies arrive on the scene faster than our society and its legal code can keep up. Sometimes this can be a good thing. For instance, 3D printing allows people to print out unregulated gun parts, thus allowing gun owners to circumvent the onerous laws of our government, which has struggled to come up with new laws to restrict the technology.
When technology advances at a breakneck pace however, it can also be quite dangerous for our liberties. This is especially true in regards to privacy. If a new technology makes it easy for the government to track us, you can bet that the government is going to take its sweet time updating the legal code in a way that will protect us from surveillance.