I use the "as we all know..." form. Whenever there's an obvious elephant in the discourse and it has to be addressed to let the rest of the lesson go ahead, I do that one and say whatever I'm supposed to say. "As we all know, China has five thousand years" and worse. But it's been such a long time since political questions were explicitly part of class that I can't remember the last time. The days of "Teacher, how about [ideological or authoritarian issue that'll make the teacher wriggle]" appear long gone. But it's not like I teach politics or law or history. As such, being essentially silent this way, I do wonder sometimes.
The "as we all know" form does allow for satire though. "As we all know, [exaggerated version of a politically accepted condition or fact]". But I have a vague impression, might be entirely subjective, that students these days are unsettled by politics in the classroom in ways they didn't used to be. In the past they could, led by boys, be counted on to be a chorus, with possibly some exceptions who would talk to you after and say they still appreciated your class. These days... well, I don't know. I don't test them that way, and they seem not to want to test me.