My tree is on GenesReunited.
Obviously living people are not named, but I also decided not to name most of the people with 'children' living. I wasn't happy when a stranger put my Dad's details on their tree, even though he died a few years ago.
As for not doing the family history, I know that a friend of mine won't do hers because of 'skeletons' that she would prefer to be 'forgotten'.
When I announced to my grandparents that I was going to research our family tree, you could have cut the atmosphere with a knife. My parents got interested, too, but my grandmother was very much against it. It was, again, because of protecting people's memories ~ related to some illegitimacies, etc.
When we contacted a family, whom we believed we were connected to through an illegitimate line, we were accused of traducing memories, and I'm sure that I read that people could be arrested if they asked people for family history information and it upset them.
I was only talking to my Mum about this recently. Some of the info I discuss and post would have upset my grandparents terribly. Perhaps I am disrespecting their memories ~ memories of people who I loved & who loved me ~ by doing this. However, I do think that attitudes have changed and that they would appreciate this ~ and that they would (maybe did) say that it was ok to do it after their deaths.
I love my hobby and don't plan to give it up ~ but I can see both sides.
I can certainly understand why people mighht be wary of posting things on the Internet. However, it is a very effective way of 'finding relatives ~ and, so far, I haven't encountered any major problems.