Exactly. Being offended in and of itself is worthless (I'm sure we can find that Stephen Fry quote somewhere in this thread), it is not a motivator for a behavioral change, at least for me, unless I care about the person being offended.
When I do offend people, I often like to probe as to _why_ they're offended. In my experience, most people seem to be incapable of defining any concrete reasons as to why a given statement is offensive other than circular, "it's offensive because it's offensive" reasoning.