Sigh. Yep, Revelation 13:15 is foolishness because even though the world now has the technology to make that passage come to pass, it's just something from a computer and everyone knows that nothing that God said in the Bible has ever come to pass and, when you get right down to it, the Bible is a book of fairy tales just like Aesop's fables. Nobody should be the least bit alarmed that Revelation 13:15 can now happen because, yeah we can now make it happen but the Bible is a joke and all the Biblical prophecies that have already been fulfilled down to the last detail were just coincidences.
You just keep right on believing that. But you may want to take a peek at how everything plays out just in case you're wrong.