At the moment, they are only a thing in a few states and I'm not sure how often they're used even there. In some states like Florida it does require some proof, but in my state, while the proposed law got close but was not passed, in addition to everything I said above the complaintant was protected from being charged with perjory in the event it was found out they lied in the inital case.

Of course, the complaintant never could have told the judge "he took the last oreo," if that is what you mean, they would be required to lie, but tbh a secret hearing you're not invited to is easy for them to lie at so long as the burden of proof is as low as "he said..."

but it is an violation that is well established by law.

And reasonable. Broadening that to allow anyone who knows you to go to a judge in a secret hearing and say "he bad" with no other proof and bam 1yr without the right to self defense if you ever get it back all because he said she said is "unreasonable." It is also not well established by law considering all the laws are pretty new and all different in every state that has implimented them VS federal law that is reported (well supposed to be, they need to do their job) into NICs since like '96, and also requires a more "standard" burden of proof.

I mean be real, if the red flag laws didn't have a lower burden of proof than involuntary commitment, what would be the point of them existing? We already have IVCs, which have the added bonus of at least some caliber of mental health professional, if the burden of proof is the same the only difference is instead of attempting to actually get the person help all you do is temporarily take their guns ..until they buy more (legally or otherwise), make one, or stab someone, the danger is still there and hasn't been helped at all, with the IVC they show up in the national database instead of the just California database, with the red flag laws the cops show up and leave you alone with the angry, if disarmed, person, with IVCs they are forced into a facility, allowing someone time to escape, or time for the person to cool off with the ativan and doctors. I mean, the only reason for them is "I'm right." The question is "is that good or bad."

I'm firmly on the side of "it's bad, innocent until proven guilty is good."

openly threatening people and displaying extreme anti-social behavior

You mean things that can get you IVC'd? So IVC, red flag laws are often built for abuse, you don't need them unless you intend to abuse it, and if they're not built to abuse they are functionally the same as an IVC just "less good anyway."