I see oarsinsync posted this comment: >The downside is every single thing you do is logged and tracked against your card, and associating a card with an indivi

I see oarsinsync posted this comment: >The downside is every single thing you do is logged and tracked against your card, and associating a card with an individual is just one MTR ride with facial recognition away. Possible, although facial recognition seems to be used much less widely in HK than the mainland. Perhaps police checkpoints are another concern: you might get stopped entering or leaving the MTR if your Octopus card shows you were at one of the stations where the protests took pkace. Although, isn't it easy enough to get off at Central (where the protests were not taking place) and walk over to Admiralty/Wan Chai (where they were), only 1-2 stops away? Personally, I'd be more worried about discussing the protests via SMS or WeChat than getting there on my Octopus Card. Disclaimer: not a HK citizen.