Meaninglessness is meaningless. People go on about things being meaningless and act like it means something, which is just a plain contradiction. You say that life is meaningless, and that affects how you see life, but if something changes the way you see life then you clearly see that thing as meaningful. But it's not. You try to be above it all by acting like nothing means anything to you, but then turn this into your own little philosophy about how we should interpret meaninglessness and what meaningless means, just digging yourself into a hole of confusion and angst. Meaninglessness becomes the most meaningful thing in the world. None of it makes any sense, so it can just be used to justify any statement. Life is meaningless, so it's okay to kill. Life is meaningless, so we should all be sad. Life is meaningless, so we should all be free and happy. Life is meaningless, so we should all become cabbages. Life is meaningless, so there are no morals. The problem isn't with the conclusions people reach, but the fact that they think a conclusion can be reached at all. To say that something is meaningless, and then follow that with 'so' or 'therefore', is an oxymoron. If something is meaningless, then there's no conclusion to draw from it. And if there's no conclusion to be made, then there's no reason to dwell on it, and nothing worth saying about it. Instead though, we find people treating meaninglessness as the most meaningful descriptor there is. It's stupid. Meaninglessness means nothing. Meaning means nothing. Anything can be called meaningful or meaningless, it doesn't matter. It makes no difference, it describes nothing. It's a statement that means something different to everyone else, thus has no definition and effectively means nothing. It's meaningless.
Before someone complains about contradicting myself, I mean that meaninglessness in an existential sense is meaningless in a literary sense. The word itself still means something, of course.