Brian potentially not being allowed visit would have less to do with ‘no flatscans or genetrash’ and more ‘Jamie is a monstrous s&@t with reality warping powers, who’d throw a fratricidal tantrum for giggles’
If and when Ma Guthrie is barred from seeing Icarus when he’s resurrected on the grounds of being a baseline, then we can talk. Until then we assume that those baseline friends/relatives of the mutants can visit with a chaperone