I've noticed three potentially duplicate questions about creating a left-linear grammar today, one on MSE, two on here. MSE was the first to be asked, here, then this nearly identical question was asked on CS.SE, followed up by this question about constructing an automaton for the problem. All three questions were asked by unregistered users; I don't know if they're actually identical. How should these questions be handled?
ETA: A fourth question just showed up.