I'm kinda on the fence here. I took it as him possibly having too much fun, to the point of being disruptive, kinda like "That Guy" who takes Game Night a little too seriously. Yeah, it crossed the line and there's 50K on the line here...but at the same time it's also moot because a) he stunk at the game and b) the contestant needed, what? Two or so correct responses (I forget)?
The opponent more or less had the win in the bag; if it were a 21-14 scenario or had she picked the Mystery 7, then yeah, I'd be more willing to pull a yellow card. Regardless, props to her for not being rattled by it. I could see that going a much different way, esp. if it's a close game.
But again, moot point because Anthony was terrible, so I wouldn't be calling him for future episodes anyway.