The fact is that acceptable behaviour varies from culture to culture and it's impossible to segregate all of it. Two questions are involved here ... (1) do you consider this acceptable and (2) would you consider it acceptable for general consumption. The things we personally consider acceptable are not really going to change but there is a change in the general community, this causes us to re-assess (2) above. Speaking personally, I have always tried to function according to the standards each individual appears to expect - within my own personal boundaries. This means being nice to the nice people, flirty with the flirty people and so on. This applies equally to rl and to sl. However I have always been aware that there is a 50:50 chance the person behind any avatar is underage and if a person behaves in a way I consider to be juvenile this, to me, is proof that they are indeed underage. Put simply - if an player appears to be immature then they are. Even more simply - if they act like a child then treat them like a child