Well, in my group, there's no taboo on telling people your political opinions and voting behavior, only on asking (because it's nobody else's business unless you choose to make it so). So in practice, I know the political stances of most in my social circle.
Yeah it seems there is less of a taboo among my friends, despite a strong tilt in one political direction.
I suspect this is because most people assume everyone shares the same opinion in our state