Why would shorting be illegal, either in this account or that account? No dude, what's illegal is him initially pumping up GME and then subsequently selling all his positions in his secondary account but only showing his position in his primary account. Thereby giving false impression that he's still in the trade.
Shorting isn’t illegal. Longing in one account and shorting in another to make it look like he’s not doing that is.
But there’s no evidence he’s doing this.
if he discloses a long and subsequently sells it, that’s not illegal. Hedge funds do this all the time; so do people on this board.