Dense Veldspar has a great example of the kind of playstyle or attitude that is glaringly different between carebears and those who realize that EVE is full of, well, anything. Go check it out, it’s a short and to the point post.
The difference between a carebear and someone who just prefers high sec is their attitude in cases like this. To grip and complain, or to file a petition for harassment are carebear indicators. To shrug it off and to realize its just part of EVE is just facing facts.