Looks like some type of chamomile...
You should be fine harvesting the plant. Nobody's gonna care about something as small as that.
If harvesting the plant, bring some scissors and cut off the top third of the plant, leaving ample leaves at the bottoms for the plant to regenerate. Don't pull it up by the roots unless you're going to transplant it.
Thank you. I appreciate your comment. I'm very invested in solarpunk, and would give anything to see a solarpunk world come to fruition. Without addressing the challenges and finding solutions, our movement will not be as effective. I'm happy that this discussion got a lot of engagement (by lemmy standards) and got people thinking.