Toysoldier's inital post seems to sum up my thoughts exactly. I'd like to add this:
It seems as though LL communications strategy is currently aimed at a "Typical User" and the assumption in the user profile is that FB and twitter are their favorite tools for communication. Given the responses here, I think that's cleary not a fair or good assumption to make!
Sl is incredibly diverse, and most of us maintain a clear separation between RL and SL identity - and this should be fully accepted and worked into any communications policies.
In general I think that, like any business, LL bases a lot of decisions on the idea of who their "Typical User" is - and I think that a lot of the negative feelings towards LL stem from this. Somewhere along the line "Typical User" profile has become too narrow, and moved too far from being representative of actual customers to be helpful.
In fact, it's feels like the "Typical user" profile has evolved into an "Ideal user" profile now - based on the customer LL would like everyone to be, not who we actually are. And that's the opposite of helpful as it leads to resources being targeted to the wrong areas, and communication being aimed in the wrong direction.