I have played many evil characters and all have been fairly successful. I did engage in some "pvp" when I was young, but had the other pc ressurected immediately, and apologized to the player.
I like lawful-evil as an alignment, as it fits in, and I dont favor heinous acts at all, they are vulgar, and unnecessary. No rape, nothing gross, it isnt necessary either. In fact, I'm likelier to kill the rapist. LE characters have friends, stick by their friends, and work well with others. I am not into pvp, I am not into disrupting groups.
Maturity is the key, as many have said. Young kids in it to play the serial killer who wants to kill everyone obviously dont play nice. They arent the "Gentleman Assassin" or Genteel Knight, who have a nice smile, and ruthless heart, they are driveby shooters, raving madmen, and not the sort of people to run in a group. These same groups have bizarre heroic characters, also, by the by.