Can I post to a facebook applications wall before the user "Likes" the application?

I have a mobile application that can successfully authenticate and post to the user and facebook application's wall after the user goes to the web site and "likes" the application.

Is there anyway to have the user "like" the application without requiring them to go to the web site? Or is there anyway to post to the applic开发者_如何学Pythonations wall without the user "liking" the application?

No, otherwise there would be infinite apps that would spam the hell out of everyone they could find, without the permission of the users being spammed.