The proliferation of technology will hopefully stop fascism in it's tracks.
Technology is a double-edged sword. On the one hand, you are correct, anybody can go online and share what's happening and theoretically everybody in the world to see what's going on. This could (and probably does) prevent a lot of bad stuff happening.
On the other hand, technology itself could become a tool of fascism.
For example, universal credit, which is replacing all working age means tested benefits, requires every claimant to manage their claim online. The idea is that everything is joined up, all their efforts at jobseeking are recorded, HMRC can provide real time updates on working and income etc. all JCP communications are done via the claimant's online 'journal'. Very efficient.
In reality, UC is a complete dysfunctional clusterfuck and its architect, Lord Freud, is also an advocate of blockchain as a system of paying benefits. It would tie in beautifully with UC. It's modern, it's high tech, it would help our benevolent govt. provide the best budgeting advice to all claimants. It would permit them to spy on every single penny spent by a claimant, where, when and what on. It would permit them to block any purchases that were deemed to be not in a claimant's best interests.
Another example is propaganda. We live in an age of fake news, alternative truth and algorithms that funnel content at you depending on someone else's agenda.