Honestly, you can pretend to hear from God and it will work for you and for those you tell. More than that, you can actually believe you hear from God and that is even more powerful and convincing. You can believe anything you want and the world will rush in to substantiate it. We need to realize that this happens.
Have you read Endo's "Silence"? If not, you should. It's a powerful and honest writing about the silence of God.
This isn't to say I don't feel as though I've received direction or revelations from without. But they fall under a totally different category. I don't even know how to explain them, and they have been, generally, scary as hell.
Have you visited davidhayward.ca?