theymos has already stated that all mixer official admin accounts would be banned, and that any associated threads and ANNs will be locked and archived. Lotteries become pointless if the OP is banned.
If the US bans Bitcoin, you can't really blame theymos for not wanting to be an outlaw. Whether we like it or not, we still have to follow the laws of the country we live in.
theymos could be our second Satoshi; hand over the forum to someone in a safer country like NK and live happy after in the U.S without breaking any laws.
Every business is moving to North Korea and now I know why.