If everybody doesn't participate equally in the general strike, then it's basically burning down your own neighborhood to protest something that happened on the other side of town.

If everybody does participate, then it amounts to burning down the whole city.

It's such a dumb idea that it's almost indistinguishable from an attempt at subversion by the actual parties/powers being protested. Announcing such an effort 3 days ahead of time while making no specific demands is just icing on the proverbial cake.