What am I? Chopped liver?

I'm disappointed by my theatre friends and acquaintances who ask to read copies of my plays and then--nothing. Several have done that to me. There's an investment of about $8.00 in materials and postage to send a script anywhere. That's just a fact, not a whine. The cost is nothing when compared to my desire to get the play known and my hope for maybe a helpful comment. But--nothing? Not a peep? People don't have to like my plays. In fact, if they don't and can express why, the comment is immeasurably more valuable than compliments. And from theatre people? Hoy, chihuahua, their opinions would be the best! But nothing? Even a responding email that said something like, "Sorry, I think it's pretty boring; there's no real conflict." Or maybe something like, "I think you need to sharpen up your dialogue skills." Those comments would be helpful. To my way of thinking, common courtesy demands some reponse, even a lie if that's the best a person can do. But nothing? So I'm left with... What am I? Chopped liver?