"sends it to all of your Facebook friends" implies, to me, that every single one of your friends gets a wall post. That means a notification, which they have to

"sends it to all of your Facebook friends" implies, to me, that every single one of your friends gets a wall post. That means a notification, which they have to click on to discover the content. Farmville lets you send invites to all your friends. But I assume you have a choice about it - invite all your friends, or none, or choose some to invite. And it's always one of those "you have an X invitation" things which you can ignore because you know the content without looking.