To be clear: They were told, both of them. Repeatedly. And, as I noted (with links to specific posts even), they decided to just double, triple, or even quadruple down on it. This was not a case of some poor, misinformed posters making an accidental whoopsie and then, before they could say "Oh, we didn't know! My goodness, how silly of us, we'll certainly never do THAT again!", getting hammered by the mods. The chain of posts involved is... pretty clear.
And, again, I'll be the last person to argue against them being shown mercy in this case. Mercy is a virtue and it's good to show it in many cases. But I'll be damned if I'm the one who argues for it in this case, for the reasons I very clearly laid out in my Tribunal posts.