Oh! I have a few more:
1. You're trading FC's, and someone randomly barges in. It's someone who just started the game or is super suspicious. They ask, "Can I join?" and you feel like you have to say yes, so you do. You hang out at someone's town, having fun with each other, until the weirdo barges in. They insist on playing an awkward game, and if stuff doesn't go their way, then they yell at you.
2. You're landscaping with a friend, and someone arrives. It's an annoying person, so you ignore them. While you're making stuff look pretty in the grassy area, they're cutting all the trees.
3. You're with a nice group, and you're just about to trade FC's when a beggar arrives, and starts asking for stuff. If you don't give them your crown/million bells/items/Gracie clothes, then they threaten to flip the switch.
4. A person insists on doing roleplay on a certain game that you've never heard of, and without asking if you want to, they give you a role. You try to do your best, but they keep saying that you're doing it wrong.
5. People who say bad words in every sentence, and talk in all caps.
LOL, I don't know why I still do Club Tortimer these days.
- - - Post Merge - - -
I only go for the island gift shop items. So I island hop and never stay very long. But I always reply with a hello if I'm greeted. You make me feel bad... D;
Oh, in your case, you're not one of the mean ones. I'm talking about the people who don't even say hi, and if they do say something, then it has a bad word in it.

Sorry if I did make you feel bad, though.