The more Antifa masks while causing problems, the more communities, cops, legislators will push back against masking.Also, Antifa will just get better at covering themselves. Remember, of all Antifas, only a few handfuls have been identified this way.
One thing Antifa may learn is to all use the same (brand of) clothes, no branded/coloured backpacks and so on.
So for instance in Auburn, Antifa were forced to unmask
It is not necessarily unconstitutional to force people to take masks off. And while it is in California, and for good reason to, there are still ways legislators have been able to craft laws unmasking people, so for instance on UC campuses, you may not wear a mask for the purpose of intimidation.
If that is seen as constitutional, laws like that could easily force antifa to unmask, or would give cops much more power to break up antifa demonstrations.
It will be interesting to see this case go to the Supreme Court when the Popehats argue that it should be okay to wear masks even for purposes intimidation.
Is It Illegal to Wear Masks at a Protest? It Depends on the Place
Alternatively, it will be interesting to see an anti-NSA anti-Facebook clothing industry crop up where everyone is wearing the same low contrast, stealth, hooded burqas.