Is this satire? You don’t see a difference between secret police disappearing political dissidents, and Twitter telling you to sell your racism somewhere else?
Yeah, political dissidents don't dissapear - yet, I'll give you that. That's mostly because the system is rigged so that they don't have much impact anyway, they're organically lost in the noise.
In times where there's more fear about dissidents, you get McCarthyism, blacklists, and people fired from their jobs, Hoover's FBI blackmailing politicians and journalists, and so on. And even in more benign times, from MLK to SDS members, and from human rights activists to Kent State students, had taps on them, police records in the tens of thousands of pages, intimidation, and attempts to frame them with drugs, snitches and other BS. Heck, even John Lennon, a harmless famous pop culture figure if I ever saw one, had FBI records the size of a small library.
And this goes all the way to modern OWS members, environmental and political activists, black rights activists, character-assasinated journalists (from Garry Webb to Greenwald), and so on.
And if we extend it to the "but they deserve it, no?", war on terror, I don't see much of a difference between a state with black sites, extra-judicial drone killings, and off-shore off-due-process camps, with people exposing state crimes like Manning in prison and Snowden in exile...