To release live mosquitoes in a crowded room is a surprising thing for a wealthy man to do. Theoretically, Mr. Gates is opening himself to legal liability (1) for assault on the people who don't want mosquitos biting or harassing them, and (2) for damaging the conference and the venue where it is being held. From a purely legal perspective, Mr. Gates would have been wise to obtain consent from all affected people (including the owner of the venue) before he unleashed this menace. [By the way, I fully acknowledge the value of the point Mr. Gates made. He should be congratulated for making such an important point so effectively. Such a display took great courage on his part.] --Ben