For anyone interested, this podcast miniseries from Robert Evans has a discussion of tactics and ethics from many of the folks who were the main organizers of the Portland protests in 2020. A large number of them are teenagers - to the point where they took steps to hid the kids' identities for the podcast. Not a direct tie to the folks from the article I would guess, but very similar group.
It was a very interesting series, and (unsurprisingly) paints a very different picture of what went on in Portland in 2020 than police and magas try to claim.
https://www.iheart.com/podcast/1119-uprising-a-guide-from-por-73255667/
As with any such podcast miniseries, this is best listened to in release order.