the answer to that depends on the nature of the crime; if the "crime" is for drug use or the failure to pay a fine, it is obvious that Blackstone was right.

If the crime is of a mala in se and ongoing nature that will result in further damage to society, then by utilitarian measure it is better that 1 innocent man be jailed

example; a terror group plots a mass murder spree. if a raid on the group bags 9 terrorists and 1 man who is there by coincidence ( a relative perhaps), the lives saved by the raid are more "valuable" than the one life degraded by loss of freedom.

it would be nice if life were white and black and moral codes were easy to create and abide by.

so in the case of Steemit, you would have to make a judgement on how serious the damage caused by the 9 spammers versus the one innocent poster could be.