I was goin gto ask who could possibly black list you, but I guess the comments brought that out. Dont sweat it. Blacklisting is a sign of strong opinions on your part that someone else does not, can not, or will not tolerate. Or as someone else said, for the trolls that like to throw stink bombs on your blog with no meaningful additions to make.
I have been blacklisted 4 times. Once I think it was a mistake, the other 3 were because the people could not have a rational debate and had to blacklist me for fear that I might taint their utopian ideals.
You are always welcome on my blog. I have never seen a bad comment by you, even though I dont agree with all of them.