You're not allowed by law to disregard the jury instructions. It's a practical effect of keeping jury proceedings secret. People do it anyway, and it's highly

You're not allowed by law to disregard the jury instructions. It's a practical effect of keeping jury proceedings secret. People do it anyway, and it's highly unlikely that they'll be found out, but the problem is it's a double-edged sword: in this case, justice might have demanded it; on the other hand, a Klansman could use the same approach to get another member off the hook for an obvious murder conviction.