Even non-legends have that happen to us. That's why I prefer to lurk when I have time and, if I have anything I think I can contribute, will usually respond to the poster via PM. I like to think of myself as controversy-adverse...
Welcome to SB. I'm not sure I would classify you as a non-legend. Those of us who have read Shadow Divers and are fascinated with wreck diving know you well by name and that you have contributed a lot.
But you're right, the nature of online forums and electronic media means everything you say is on record forever and you could be held to account one day. Many people don't care... now.
I hate to imagine what it's going to be like in 20 years as all the naive teens now posting their youthful escapades on myspace and youtube start to become prominent members in society.