Write on the back of the print, or in a text file with the same name part as the .jpg (or other image type).
-Full date and time
-Location: full address, general description and name of location
-Full names of all the people. Describe relationships.
It's a really good idea to do this, or about two generations later, nobody will know anything about the photo.
The "property is theft" argument is pernicious. For one thing, taken literally, the two terms are opposites, so it boils down to saying "A is not A", or "No means yes". What libertarians are fighting for is that "No does not mean yes; no means no". Property rights (CICPR; see the tag) do not only include the rights to our own bodies.
"Property is theft", taken another way, seems to translate to "Property rights were violated in the past, so we (Who is "we"?) need to violate them today to even things out." But violating property rights in the past didn't help, as can be seen from the anger about that today. Continuing to violate property rights will continue to make people angry. The best thing to do is to maintain and improve our western system, and anger will gradually subside. Effective and hard work will help with this. Property rights being violated in the past implying that they should continue to be violated is something else that doesn't logically follow.
This is related to the concept of "forgiveness", or letting go of resentment on a personal level -- it doesn't mean condoning bad behaviour. See "You Can Heal Your Life", by Louise L. Hay in the Tags above.
I don't believe the police should be defunded; maybe not buy them toys like armoured personnel carriers if they can't behave as peace officers. But they shouldn't have special rights under the law, either. No-one should. Distinguishing features of the police should just be training, equipment, and being paid to do it full-time.
Neither should unions, employers, or anyone else have special rights under the law.
In the US, the first Libertarian congressman, Justin Amash, has recently put forward a bill to remove the doctrine of immunity from the police. This doctrine was specifically disavowed by the US founding fathers, but the US Supreme Court subsequently invented it.
Some of this COVID-19 hysteria appears to be destructive.
As to why there is always a mass movement back to the "good old dark ages", I speculate from the final theme of "Atlas Shrugged": that some people want to kill everybody else, knowing full well that their own deaths will follow. I think that, due to peoples' knowledge of own mortality, this very dark and sick motivation develops. This also shows up in anti-nuclear-power, the anti-technology movement, and the anti-property-rights (CICPR)/anti-free-market movement. The urge to death has been the foundation of dark and sick philosophy since Plato, and before.