A problem for whom? If a form of government requires someone, somewhere, to prevent people talking to each other, this form of government is illegitimate. Period. The end.
for the people themselves, i'm not thinking about political power wishing to control minds, simply the way human communication might fail when everything is flat (and again, i'm just a simple nerd, not a researcher). what used to be local is now global, a bad idea in a village can find resonnance in other places, people start to convince themselves. the depth of information is also reduced (see how every puppet candidate is using tiktok snippets to appear charming)