Users was exposed. hackers immediately took over the accounts of a bunch of high profile trump world figures. it was kind of an open book. then, next, the entire site was overrun with pro-isis propaganda, like literally freaking beheading videos and stuff, that was nice, that was a nice sort of next move there. you know what, maybe the third effort's a charm here. now mr. trump says he's launching a new social media service, not the blog, not gettr. now it's some other thing. but from the moment he made the announcement last night, it's kind of felt familiar. for one thing, this supposedly new...