Do all four verses at a ball game and gauge the reaction

The parts about escaped slaves not able to get away, even in the gloom of the grave is just so charming.

Yep, nobody seems to want to talk about that.

Clearly you've never listened to La Marseillaise.

There are alternatives. I've always thought "America The Beautiful" or "God Bless America" were far more appropriate.

not to mention that francis key was a racist dillweed.

Yep. The SSB's third verse is particularly racist.
And on Politics the denizens are having fits over "Lift Every Voice and Sing" being sung on PBS's Capital Fourth broadcast.

Inasmuch as I understand it, we cut those versus for that exact reason? They're not exactly becoming of a nation founded on universal ideals of liberty and justice.

True. Also maybe also because the first verse pretty much sums it all up. National anthems aren't meant to be as long as FS Key's poem.

Sure, but either way the lyrics as they are now are fine. Complaining about the other versus is like hating the release versions of Lord of the Rings because of a moment in the extended cut (not a great analogy, but it conveys my point).