Yes, it's a known technique.
“The whole idea from the start was to build a site that could kind of infiltrate the echo chambers of the alt-right, publish blatantly fictional stories and then be able to publicly denounce those stories and point out the fact that they were fiction” ~Jestin Coler
Why does Rudy Giulianis original twitter account not show up in any google or twitter searches over the last few days, while this other ''fake''account shows up, yet this morning his ''original account'' shows up in a search today, there is something very fishy about this https://twitter.com/rudygiuliani?lang=en