I was concerned about this before, but not so much anymore. As you've said we're being tracked and monitored everywhere, and from what we do. I've read that CCTVs also have the capability of collecting more data from facial recognition and car plates, etc. In China, they can track people thru facial recognition and they are updated with the social score of the person. Doing all those preventive things might be nice, but I don't think they are that effective. The technological advancements are already so sophisticated that the only way to be totally protected from them is to literally live under a rock. Even though you are very careful, the Australian business being hacked and your details being stolen shows you can only do so much. Our government agency was recently hacked, and a lot of data were stolen. This is a healthcare organization, and everyone employed are expected to be enrolled in it and paying dues. All our data are pretty much out there with no fault of our own.

Personally, I still try to protect myself, by not clicking links, being cautious of emails, not sharing more info online, etc. I have facebook, twitter and other social media. I don't overly share there, and just use them to get updated with things around me or to connect with friends and family. I know it is easy to get info about me once they really try. To help me sleep at night, I just think that I'm insignificant enough for them to not want anything to do with me.