Russian military man posted a video on tik tok, and Ukraine used geolocation to find the s-400 and send the missles its way. To give an example, people on 4-chan have weaponized their axxxxx (not that there is anything wrong with that) and find out where various horrible people are and send the wrath of their internet their way. You can look at the angle of shadows, and use landmarks, etc. It's a cool nerdy thing to do but not impossible.
https://ua-stena.info/en/russian-military-man-helped-destroy-his-own-s-400-air-defense-system/#google_vignette