I don't think the first part of that is true. It depends on how the library was made.
In theory, you put (when you make the library) ">name" on the tNames layer, and ">value" on the "tvalues" layer, but people tend to be careless and leave them on "tPlace" (the default drawing layer in the package editor), in which case they show up on tPlace. If you leave them out entirely, you won't get any names on your silkscreen (or in the board editor, or anywhere else.)