That fits under “harming the property of others”. Now examine the burning of your own property (flags) during protests.
nostr:npub16kxkgqhn4yxa3823wdt487fstq39avv6ha8gqdz39l66r0gd8n7q6tgym2 Well now this is awkward.
https://abc7.com/west-hills-american-flag-caught-on-video-investigation/13964479/
Turns out burning a privately-owned flag is indeed illegal!

Discussion
nostr:npub16kxkgqhn4yxa3823wdt487fstq39avv6ha8gqdz39l66r0gd8n7q6tgym2 Who has been arrested for burning their own #LGBT flags at a protest? Every since case I've ever heard of involved someone stealing an #LGBT flag from like a woke hipster coffee shop or something