So I think that is not technically speaking impossible but you have to really, really contrive it to make Like facilitate a BCC-to-Tony narrowcast. You can create "groups of one" by altering the URLs being liked to make them unique, saving the association that "Tony" => "uniqueUserID" somewhere outside of Facebook, installing a callback function to let your website know when one of your unique URLs gets liked, and then broadcasting a Tony-pleasing message to Tony's group of one.

But what is actually going to happen is Tony is going to favorite the front page / the product / etc (those two aren't necessarily the same thing), and then the only option for talking to Tony is to take out Ye Old Megaphone and blast everyone who likes the front page / product / etc.