People really have NO right of privacy in public spaces.

If they did, 99% of your public behavior would be dictated by rules of where you can look and who you can talk to. You'd never take an outdoors picture again if any other person was in it.

If you choose to partake of modern conveniences such as computer on the web and cell phones, your activity is part of a transaction along with many others, and the ability to isolate your activity is pretty good.

If you choose NOT to, then you will have to travel by foot in a mask to engage in whatever activity with others you are worried about being traced to you. So in the wild and free 60s/70s, we could pretty much do anything we wanted to, with the only fear that a very random and not often event would cause us to be caught. Which is pretty much the odds you will be pulling if you stay off computers and cell phones, and ride a bicycle.

Have fun with that.

Go home, pull the shades, and glory in your castle. It is yours, and any attempted to breach the doorway (Hey, I smell gas, we gotta break the door down and save the people, oops, what are you doing in here? BUSTED) should be met with complete resistance.

But enjoy the fact they do use this tech to catch assholes like these. These guys weren't suicidal (much), they did not want to get caught, as a opposed to some level of crazy vest bomber. Which means the public awareness of how fast and how easy they were IDed will have some type of affect on those planning this in the future, and a couple might just say, nah, too risky.