I once made an off-the-cuff, intended to be entirely joshing remark in a forum with more of an international audience than I knew (which remark Americans and I suspect Western Europeans all understood to be joking and not borne of seriousness) that so upset another user who was from Iran that he was afraid to come and use the forum at all for a while. This young guy had been posting about hiding operating systems underneath others on the same PC, and could it be done, and he kept saying a "client" had to know... so he was getting ribbed about it , who is this "client" anyway? WHY do you need to know this? And the kid wouldn't say, so I chime in to say, "Yeah, we all know about the client anyway- that bomb making guy who must secrete his activity ..." And THAT ribbing WAS NOT FUNNY AT ALL to this kid over there- in fact he was convinced at that moment that we all thought he was involved with terrorism, etc. Several PMS from many of us and lots of apologies later, he came back- but I saw clearly how a "joke" to some of us, a flippant goof-on-it comment to me was taken quite seriously and offensively by him. I strive to be more sensitive now. Thanks LWM for the words of wisdom.