Well, compared to Nietzsche, particularly his take on the idea of Amor Fati, stoicism is in a certain aspect a detachment from a very specific part of life and that is painful or negative emotions. It's interesting because Marcus Aurelius who greatly admired the stoics also invented the term that Nietzsche would later use to categorize his own radical positivity; "Amor Fati".

In Nietzsche's view, at least the view he expresses here, even negative, unwanted and profoundly painful emotions still fall under the realm of "necessary" and therefore beautiful. Nietzsche was not one to avoid negative and painful emotions, he was one to embrace them and accept them as a vital and vibrant part of life.

I'll completely agree that in a way, stoicism does radically accept a lot of things, but compared the the kind of acceptance that Nietzsche outlined, it's a drop in the bucket.

Regarding the looking away part, I think it would be best to not read that too deliberately. Here I would argue that Nietzsche is saying his only negation will be if he isn't actively looking at something- if you're watching the sunset, you're not looking at what's behind you and he wants that "looking away" to be his only negation. Not that he wants to consciously look away from things he doesn't like.

Well, just the fact that Marsha Lineham adopted the term "dialectical" to describe her methodology kind of proves to me that the old girl was reading or at least familiar with some philosophy so that's just an interesting aside.

The reason I connect Nietzsche with radical acceptance really boils down to this quote from him -

I want to learn more and more to see as beautiful what is necessary in things; then I shall be one of those who make things beautiful. Amor fati: let that be my love henceforth! I do not want to wage war against what is ugly. I do not want to accuse; I do not even want to accuse those who accuse. Looking away shall be my only negation. And all in all and on the whole: some day I wish to be only a Yes-sayer.

You don't get much more radically accept-y than that you know? And if you break down the quote even more there's a massive tension between this massive "pessimism" (I don't think it's very pessimistic at all, but many probably would) when he discusses the necessity of things. If you read the rest of Nietzsche's philosophy there was definitely a side of him that highly doubted how much control people have outside of external, social, biological, chemical and physical factors, so in a profound way we really don't run our own lives. The other side of this is a truly radical optimism and positive notion in Amor Fati (Latin- Love of Fate). That even what is ugly, painful, hurtful and miserable is still beautiful for no other reason than it is necessary.

It's one of the most life-affirming things I've ever read. Not in the "you are awesome go out and conquer the world!" life affirming that's so in vogue, but actually life affirming as in "Life is fucking beautiful in all its facets, even the painful ones" affirming.

I may or may not have spent way too much time thinking about this before...

It's interesting that you would bring that up, and certainly there are many aspects of stoicism that would fall in line with a therapy designed to help regulate and control extreme and overwhelming emotional responses.

Beyond that however, at least one aspect of DBT, radical acceptance, is about as far from philosophic stoicism as you can get. Stoicism advocates for an impartial, detached, almost zen-like perspective on the life we live while radical acceptance calls for its total embrace, which always struck me as profoundly Kierkegaardian and Nietzschean if nothing else. I remember when I did some DBT work some time back and we got to radical acceptance, especially accepting emotions as neither good nor bad but merely as they are and accepting that it is okay to feel very intense emotions my internal reaction was pretty much "So, Nietzsche. We're doing Nietzsche now. Okay, I can work with this!"

The down vote exists so the community can deal with trolls/spammers and other extremely negative content they don't want to see on the site (hate speech, harassment, abuse, bullying etc), so the down vote serves a definitive purpose.

The problem is there's been a massive cultural influx of people who are used to the down vote as an "I disagree, think this is stupid or don't want to see it" button. It's really only to be used for something that directly violates a particular tribe's rules or the site's policies.

There's talk of altering the functionality of the down vote button, but for now the impetus is on the community at large to address down vote abuse. If you're the chief of or moderate some tribes it would be great to do a sticky about it or include something about the differences in down vote culture on the side bar.