I'm of the opinion that
1) Losing the popular vote is sufficient to consider a candidate illegitimate
2) Even if that wasn't the case, absolutely any tactic to save us from 4 years under an under-qualified, far-right nutjob is acceptable, yes including the obvious reductio argument you're thinking of
3) Marginalizing and discrediting tens of millions who voted for Trump is only a bad thing if it doesn't stick. Seriously, if I could wave a magic wand and make slightly less than 50% of the country disappear I'd do it with no guilt.
But I don't really expect the electoral college to save us, nor for recounts to save us, I fully expect that we're going to have to endure 4 years of the will of the troglodytes reminding us that democracy comes at the cost of, well, them, as we do every 8 years or so, to a particularly egregious degree this time. I posted it mostly because Lawrence Lessig saying the thing that isn't going to happen should happen is noteworthy. May fortune save us from procedural obligations to the monsters^H^H^H^H^H^H^H^H^Hconservatives among us.