To be honest, if that's what we see in open access, then there must already be something in existence that is closed. I don't want to create another conspiracy theory - I just want to point out the theoretical possibility - but if it was created, it has probably already been tested and possibly even used widely. So, in conclusion, if a government or agency wanted to use that technique for censorship, they would most likely already have tried it.

It's kind of late to ring the bells once the city walls have been taken. In other (shorter) words, if someone wanted to use this for censorship, they would already have tried it, so... it's either too late or too early; although being interesting (but not good or fun) probability, it's probability only.

...I hope one day everyone, just everyone will finally learn that most of the technologies are not evil or good, they're neutral, they're just tools. And most (no, not all) of them were also created with good intentions.