What specifically is meant by bad experience? I haven't experienced anyone push my character around, but I do quite frequently get players come along who do nothing but buzz your beetles away. Some people say sorry and it's indeed easy to do when you can't see very far south/west/east of your character, but like the other day, I had a Japanese player come along who persistently did it to my bugs. He just ran around the island in circles not actually catching anything. So I left and found another island.
I'd say the most annoying thing in my experience though is the players who join just to instantly leave again. I get that happen all the time. Are these people after specific medal objects, an empty island to themselves or are they just out to be annoying?