In abit of a hurry, so forgive me if my posts (or intentions) don't make much sense, now...
Have we considered the possibility that good and bad are, apart from perception, feelings? So, good people are people that generally feel good or 'alive' whereas bad people are people that generally feel bad or 'degenerative' (dysfunctional, stupid, sick, or unimportant) and it's their coping ways that make them generally uncomfortable on their lives - and they might have a go on others for it. On the norm, most people (even the perpetrators of 'bad' things) know it's unacceptable and something should be done about it - but why don't they? Because they don't have the power to change somebody else's condition... seeing the nature of a bad person's condition is unknown. People, on the whole, worry about themselves (but that's a seperate issue if you'd call). Religion may be a socially acceptable 'coping' strategy as it makes awareness of a God that has the power to change conditions.
... otherwise, normally the concept of 'good and bad' is second to reality - we really want to get on with our lives, and achieve what we can. I believe a lot of people, whether bad or good or both, have the potential to do good things... but if bad people give you problems, why not sort them out yourselves?