In the long run, killing players all the time just makes you a jerk, and if keep killing your group, no one will want to play in your campaigns. Of course, you could quench your player killing urges by running a lot of Call of Cthulhu campaigns. There's a d20 version. Just blame the pcs deaths or inevitable insanity on the inherit hostility the system has toward players. Besides, the builds character comment was meant to be a pun, a bit of a groaner though.