It's not inconceivable that all of us on this forum could, at some point, be labeled "domestic terrorists". And the forum itself an "extremest organization". That would have sounded highly implausible twenty years ago, but consider that the 06JAN folks have been held for a year. Their crime? Making statements and walking around at a place.
Before someone jumps in with it, yes, there were some knuckleheads that destroyed property at the Capitol, and they should face some punishment, but not decades in jail when this person, who tried to blind people - BLIND people - walks with community service. While 06JAN people who did indeed do nothing more than just walk around are sitting in jail uncharged, charged with felonies, or fined exorbitant amounts.
Not to mention the MSM and big tech involvement that helped to hide the identities of antifa protestors while calling on friends and family to hunt down and turn in 06JAN protestors.
As to being marked as domestic terrorists, I would submit that aforementioned MSM, big tech, and a large group of politicians have already marked people like us as domestic terrorists. If Southern Poverty Law Center or similar were to ever accidently stumble into APS, we would be on the lists they distribute.