I have been to a few stadiums, but I still have to go with Giant stadium (When the Jets are playing...obviously). I have so many stories, that I could write a book......
One of my friends was at a Jets vs Dolphin game, they were yelling the standard real original stuff at him (Squish the fish, you suck almost as much as your team, you ***, Marino Sucks, J-E-T-S...JETS...JETS... JETS......), which is understandable with our rivalry, and that my friend was wearing his Aqua Marino Jersey, but seemed one Jets fan was too either too drunk, not content with the Verbal assault, or both, and threw an empty bottle of beer at him, hitting him in the head (Luckily it did not break), it opened a small cut, with a large lump. Everyone saw it, but nobody did anything about it.
The same friend also one time went to another Jets/Dolphin game and people from a higher section were spitting down on him and his wife, according to him, there were so many Jets fans spitting, it felt like it was raining.
One of the guys from the group I hang out with at a sportsbar I go to in NJ, was punched in the face by a Jets fan last year, and along with a monster shiner, he also had a huge mark under his eye, for a few weeks. Luckily another Jets fan had seen this, and ran after this guy, caught him, and handed him to the police.
At one game I went to with 4 friends, 2 of which were not Dolphin fans (We were all wearing Dolphin Jerseys). At halftime, we all went quickly for a bathroom break, one of my friends (a giant fan) while he was in there, heard a sound like someone was pissing on the floor, and when he looked, a Jets fan was facing him, pissing on his pants, thinking my friend was dolphin fan. The Jets fan was very big (had to be 6'2 at least 240+), while my friend is about 5'9 175, but he was so upset he wanted to kill this guy (And this was after he pissed all over the Jets fan....and I do mean all over the Jets fan).