Groups like Freifunk are installing semi-legal mesh networks in Berlin, where there's little public Wi-fi and none in refugee shelters.
The anti-ISIS New World Hackers group performed a cyber attack live on-air.
Online activist group Ghost Security will also be taking part in the day of action.
The online hackers said they will publish their list on Thursday.
St. Louis County police denied that the officer named by Anymous is employed by St. Louis County or Ferguson