These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Moral Event Horizon: Vinny seduces The Situation's sister just to get back at him. Right in front of him.
When the housemates go to Atlantic City, Snooki calls out Mike on his behavior as of the past few episodes during dinner, and ends the conversation by asking someone for a roll. Mike chimes in with "Don't worry, you got a couple." No one laughs. It doesn't help that minutes later we learn Snooki had an eating disorder in high school that she only recently came to terms with.
Ronnie stealing Vinny's flowers, dropping a few bucks on Vinny's bed, and giving them to Sammi while trying to pass them off as his own. This after Vinny had been stood up by the girl he bought the flowers for.
We can safely say the casts' behavior in Angelina's farewell episode irked a part of the fandom deeply. It got her a decent fanbase and support, at least.
Ronnie's abusive behavior towards Sammi. We saw hints of it on season 1, but on season 2 it was blatant.
Network Decay: Being the current long-running face of MTV, this is usually argued as the channel's event horizon for never going back to music videos ever again.
Not sure if it counts, but the guidos in question are quite proud of their label.
New Jersey Governor Chris Christie (who is half-Italian) not only asked them all to go home, but has refused to give the (insanely rich) producers and executives of the show any tax breaks, something that the top one percent of wealthy Americans are entitled to. He hates the show that much.
The Situation made $5 million in 2010 because of his show contract and spokesman work for a snake oil bulking powder.
He has also been paid to stop wearing Abercrombie and Fitch clothes, so he's doing pretty well.
Would you have even known about this show if there weren't so many people trashing it and saying how terrible it was?
At least in Season One, where her inability to get along with her housemates and attitude towards her job at the Shore Store result in her eviction from the home and subsequently the rest of the show. Her return in Season Two revealed she hadn't changed much since leaving Season One, but has become more likable after apologizing to JWoww and Snooki in the third episode for off-screen shit-talking. The apology seems to have gone over well, as Angelina can be seen hanging out with the girls in the fourth episode.
And it certainly helps that Sammi's Season Two Wallbanger ways of handling her "relationship" with Ronnie have turned her into The Scrappy of Season Two.
Strawman Has a Point: In Angelina's episode in season 2 (in which she is Put on a Bus), she makes sure to call everyone out on how they're stupid, fake freaks of nature. The characters just ride it off.