I can't write badly either, but I also feel that writing BADLY is not the answer-- WRITING is the answer. I don't feel that people should feel pushed to write amazingly well, or wonderfully. There's no reason to write badly on purpose (and I doubt anyone who actually writes badly in NaNo does anything with their novel), but when you feel pressured to write to the very best of your ability, it can be hard to churn out 50k in a month's time, because every day it'll feel like a chore. Give yourself the option of not writing everything perfectly.

Don't write badly, but just write to the best of your ability within reason for the month of November. ;P