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Expecting that is how you convince a large subset of folks to never bother with said deconstruction, and ultimately let bad ideas roam free and otherwise get adopted by impressionable / gullible minds.
Snark is there to suggest the reader go do their own research.
In a context like this, snark doesn't encourage people to "go do their own research" or save "impressionable / gullibile minds", nor is that really what people care about. (If it were, they'd expend energy doing those things in a way that might actually work.) Rather, its function is to vent one's own frustrations by translating them into concentrated language. The effect this has on community is to pollute it with fumes.
This is destructive of the ecosystem, unless one is happy with a single species, the snark, consuming all the others. Therefore we all need to find better ways of self-regulating and containing our frustrations. Then we can address other people in a way that has a chance of connecting with them.
Regarding the rest, I’m happy to simply disagree with you having observed this in practice in other communities. It’s not black and white.
As for flagging, what thread are you referring to?
And we all know that nobody is going to "go do their own research" because you snarkily disagreed with them. People do research when you make it easy for them to do, not when you drive-by insult them with an unreasonable reply. Drawing conclusions without providing reasons is literally being unreasonable.
There are billions of people with bad opinions on the internet. Nobody is forcing you to educate all of them. If you decide to try, it's predictable that you will at some point become tired of repeating yourself. At that point, you have two choices:
A) take a break
B) post crappy comments and justify it by saying you're tired
The result is that I have no reason to believe you, or to even understand your point. Because you've essentially made no point.
Marx never defined the terms about value rigorously, so it can be whatever people want it to be.
I know all about socially necessary value, etc and all hacks people have applied to it over the years. There are tons of interpretations about it.
It still has zero predictive ability in the real world.
Subjective preferences explains where profit comes from with much greater predictive ability. And models real world phenomenon we see.