Baggs, people ARE quite capable of being unintentionally offensive. Doesn't mean they meant to be rude but they are.
Yes, I get that. Perhaps I wasn't clear. I don't think it is always someone else's fault if one feels offended. And I think some offence that one feels is someone else's fault, particularly if it was unintentional, should be shrugged off. Especially if the offending person is challenged and says sorry but they hadn't realised.... Depends on what it is, of course.
I sit on a sea wall crash barrier to wait for the bus that takes me home from work. If someone driving by said it made a good picture I'd probably smile and then shrug. Why would I care what some random person thought if it didn't do me any harm?
I think the word "offended" and all its relatives are overused.