Vote against Alito, or I'll reveal that you're a closeted gay man!

Even if you did read the blog, tht would be extortion, not blackmail.

Point taken, but i think the substance of my argument stands.

Yes, mhendo, I should have labelled my post as nitpicking and acknowledged its irrlevance to the thrust of your argument.

Isn’t blackmail just a particular kind of extortion, anyway?

Extortion: “Do X for me, or I will do Nasty Thing Y to you.”
Blackmail: “Do X for me, or I will divulge Nasty Secret Y about you.”

Just looked it up in my ancient dead-trees dictionary, and they concur, defining blackmail as “extortion by threats esp. of public exposure.”
At any rate, blackmail and extortion are reprehensible as well as criminal. I have no problem with ‘outing’ someone who publicly works against the very thing they are or do out of the public eye, but if someone’s going to do the outing on such grounds, they should just do it, and not explore whether they can profit from not doing it.