Personally I would not be offended by someone thinking I was male (unless they could actually see me at the time.) In fact a lot of people assumed that "Zed" was a male sounding name when I first arrived on the board. I am not insulted by "masculin" terms like manned but I do think that truly gender neutral terms can help to (slowly) change attitudes. I dislike gender screwy terms like woperson and I am offended when PC terms are carefully used to cover up continued actual discrimination. eg when a business changes from having a Chairman to having a Chairperson with a hidden resolve never to have a female chairperson.