Your predictable speech displeases both of us. I finish your sentences and am bothered by inefficiency. Thus, speak/write efficiently, to the point that I can't predict it.
Others may also dislike it as I do, but infer the rest at different levels.
Large audiences lower inference standards.
(I figure LessWrong can handle the compressed version)
This contradicts common advice. There is an optimum; do not go arbitrarily far. Perhaps reverse this.
There are a whole bunch of ways that trying to optimise for unpredictability is not a good idea:
Humans are not Vulcans, and we shouldn't try to optimise human communication the way we'd optimise a network protocol.
Efficiency trades off with robustness.
If you, the listener/reader, fully understood what I tried to say, it is very very likely that you (specifically you) could have fully understood had I compressed my communication in some ways tailored to you.