This is a topic that pops up a lot that I'd like to clarify. I am going to try to explain, in very simple, basic, plain-English terms, why so many of us side-eye the crucifixion of the slavers and certainly do not see it as the shining example of justice that others do. You basically have four possible scenarios. 1. >163 masters in Meereen ordered the murders of those children. By only executing 163 in turn, Dany allowed guilty people to escape unpunished. Assuming she did execute som