Juggalo or Juggalette face paints could also confuse current recognition systems.
[1]: https://cvdazzle.com
Otherwise, glasses, scarves, hoodies, umbrellas, numbers... the usual, no? Makeup and lofi prosthetics if you wanted to get fancy.
In any case isn't facial recognition rather less an immediate issue than, well, tear gas?
If you’re not into the “liberty or death” thing, you might want to flee China instead.
Either way, good luck.