[kmeisthax]

> But if you don't reveal that and get into the jury you are free to rule as you want and to try to convince the other jurors to do the same.

This is perjury. On your jury duty questionnaire, there was a question (something about "faithfully upholding the law" or something) which is a roundabout way of asking "By the way, you don't plan to do a jury nullification anytime soon, do you?". If you said no to that, then got on a jury, and told everyone to do a jury nullification, you've done perjury, and you actually can be punished for that.

The only legal way to nullify a law is for each member of the jury to individually decide they don't like the law and vote to nullify. You can't convict a jury for falsely acquitting. But you can convict a jury for conspiring to do so.