> "LMAO", or "dang, that sucks"

If that's consistently all they have to contribute then they are also just a noise source.

I think I counted maybe 1 or 2 times I thought a bot provided real value, though I can't remember off the top of my head what those times were.

It also got me thinking about why throwaway comments by humans, like a simple "LMAO", or "dang, that sucks" still feel like they have value, but a bot's meaningless slop doesn't.

SimpleStacker

Thanks for identifying some of these. 

Now that you are an expert you should be able to automate your thought process into a probabilistic bot detection routine :-)

chaoticalHeavy

It's tough because the most telling signal that someone is a bot is that their content consistently provides ZERO value.