I don't see anger in "LETS F**ING GOOOOO". It's just a comment that says "let's do X" in impatient and enthusiastic manner.

How about, "LETS F*ING GOOOOO YOU DINGBAT", now if that's a comment between friends the addition of the insult might be said in jest and still be impatient/enthusiastic, or does by adding the insult to the end automatically label it as combative?

I realise this wasn't part of the dataset, more making a point that written language without context ( and sometimes even with ) is subject to huge amounts of reader interpretation.

Agree that context is often needed! (Which is why it was strange to us that raters weren't presented with any context besides the comment text itself -- not even the subreddit, much less the original Reddit post.)

One interesting question, though: if "LETS FUCKING GOOOOO YOU DINGBAT" were meant to be a combative insult, would someone still add a bunch of O's ("GOOOOO" instead of merely "go")? My intuition is that if combativeness were intended, "let's fucking go, you dingbat" would be more likely than "LETS FUCKING GOOOOO YOU DINGBAT", but of course it's a bit hard to say without that context.

This one is indeed hard to label.

PS Hope they will never begin solving philosophy problems with ML.

As a native speaker of Reddit English, "LET'S GOOOOO" is a slang expression that means "yay". People who write it are usually not literally suggesting that the reader go somewhere or do something.

Yeah, fight.

That is 100% enthusiasm, not ambiguous to me at all.

But I'm also certain both my parents would read that as antagonistic.

It could also be 100% irony. Without context it's hard to tell.

Which applies to a lot of online content, especially on Reddit

Kamala 2020!!!! could be a ringing endorsement, a lighthearted parody of ringing endorsement or utter derision depending on context so I'm not even sure the commenter classifying it as "neutral" was wrong.

Let's say you are bored out of your mind at a party or while waiting in line for at the bank and tell your friend "LETS FUCKING GOOOOO". It might not be anger but definitely not enthusiasm either.