Perhaps not you, but others can do it,
for example avatars or someone else, as you are watching for descriptions.
Yeah paladins can use detect evil but as i know they must use it on someone who is near of em?So it will be a bit harder
then simply look in WHO list who is evil and go to hunt him and
they will KNOW that i am evil before they meet me and attack immediately after meeting, but if they must commune detect evil, this will give me a bit of time to act.