Staying home isn't a tactic, it's the expected, predictable effect of the DNC's actions, telling the "vote blue no matter who" crowd to shut the fuck up so the DNC can't delude themselves into thinking they have a path to victory that doesn't consist of "promise progressive policy, then use every single means at your disposal to enact an uncompromised universal version of it, even if it violates norms, courts, or any other bullshit we see republicans use".