I read the original article when it was posted last week. While I enjoyed it, I really can't say I thought it was too controversial. As I remember it (and I didn't reread it now), it was a bit of a condemnation of the so called celebrations of Thatcher's death, and instead asked people to try to reflect and perhaps make something constructive out of it. I'm not sure why that would be banned, but Reddit mods seem to ban things willy nilly sometimes, seemingly without rhyme or reason.
Anyway, I think getting banned form that septic field of an internet domain is a badge of honor. FWIW, Hubski content is banned all the time. Not because it's controversial, but because they just plain don't like us. It's their site and their right to ban whomever they please, but I think they really aren't doing a service for their members when they do this kind of thing.