@bmcreider,
Can you have creation without destruction? Can that be a metaphor for good without evil?
I like myself, and have a relatively clean conscience, even after thorough paralysis by analysis, so I like that. But - it is those people who are willing to deny ethics, or anyone else, that willingly take advantage of others. This doesn't appear to be unusual in any animal kingdom, competition is natural.
But then it seems much of philosophy makes a case against that natural dog-eat-dog mentality, and prides the reader on being selfless, or attempting to, to try to initiate a reciprocity following the golden rule.
But, obviously, some here say not to worry about them, or listen to what they say, because they (if they can't understand your assertiveness) just want to exploit you. But then many others say judge not lest ye be judged, and, if I constantly look over my shoulder for exploitation, which I could and do, then do I not fall victim to self-fulfilling prophecies? If you expect people to exploit you, won't they? If you don't, will they?