If I was the victim here I wouldn't care if I got banned because I'd never play in a place like that again.

I suspect that you would have looked at the stack and if you couldn't tell how much it was you would have at least expected the dealer to break it down...

I'm guessing seat 6 was in the way?
If seat 7 can't see the other guy's stack, it's up to him to ask for a clear view and/or a count. He also should have insisted that the chips be moved into the pot.
The dealer should have verified the bet by breaking the stack down.
I still don't understand how $180 can be mistaken for $80, unless player 7 was hiding another stack.

If I'm all in for $180, another player asks how much and the dealer says $80 I'm speaking up.

$180 can easily be mistaken for $80 if there's a black chip ($100) at the bottom of a stack of red ($5).

There's no way that a player who knows they have a black chip in their stack should be okay with a dealer proclaiming the all in amount is $80. Even if you're afraid to speak because it'll give off a tell you can uncover the black chip.

This is true. Also what Angus said.

However, it is also true that hiding big denomination chips is not allowed. So even though the player massively screwed up by not protecting his action and requiring the dealer to physically break down the stack and physically count the chips, I would find villain in contempt as well for not speaking up about his $100 chip (I'm assuming it wasn't 4 $25 chips because the dealer would have seen that).

I understand why the room would ban the player who didn't pay up (because that is technically the rule) but my solution would have been different. I would have banned the villain as well unless he relented and took just $80, in which case both players would be allowed to stay.

There’s a good chance you don’t even realize the mistake. Dealer has his head turned towards a different player and you hear ‘one eighty’ instead of ‘eighty’ because you expect to hear 180,
That would make the stack $175 not $180.

If anything, there could be a stack of 20 reds and another one of 17 chips where the dealer not only misses the black chip but also miscounts the number of chips because he doesn’t break them down.

It’s easy to accuse the player of malicious intent but there’s zero indication in the OP to not give him the benefit of the doubt. On the other hand, it’s also possible that he got angled by the caller who was perfectly aware the stack was $180. If he wins the hand, he takes the full $180, if he loses he pays only $80 and goes home. That’s basically a free roll if you are OK with getting kicked out.

Did I miss the part where OP said the misunderstanding was because of a hidden $100 chip or are you all just assuming that was the case?

I'm assuming it was a "hidden" black Chip easier to miss that then it would be to miss 4 green chips or 20 red chips or 100 white chips

What if it was all red chips and the dealer just had a brain fart and the player was to self centered to take the time to look for himself? Or what if the player thought it looked like a lot more than 80 but liked 80 better than what it looked like and thought he might take a shot? These are all very real possibilities. Trust me, I've seen them live.

Idk man, anyway you stack it (puns) is going to be hard to miss. You got 4 stacks? That's 4 in each for $80 (9 if it's $180). 8 stacks? One stack? Come on 20 reds is hard to miss.

Exactly, so in that case you would make him pay up right? I'm just trying to keep the thread on track since no one ever confirmed that there was a hidden chip. It does make a difference in a ruling obviously.

It’s also hard to miss when stacks are uneven and a black chip instead of a red one is $95 more, not $100.

If there was a black chip that was actually hidden behind other chips and not on top of a stack of red, there’s a 99% chance OP would have mentioned it.

Is it possible there was a hidden chip? Sure. But it’s also possible that all three parties involved are extremely myopic and all of them forgot their glasses at home that day.