It would certainly be nice to see a signed message. It seems like you are cutting out a portion of your "hunters" by not posting a signed message proving you control the funds.
Just message me with proof of RELEVANT information holding and from there we can talk. We don't feed trolls/morbo/curiosity nor lose time over any lurker saying "show me yours!!"
In the same breath, your saying "show me your information!" without wanting to show proof first either. You had posted information that you have already received from other members, have none of them asked for verification? You've lost more time responding on why NOT to post a signed message then it probably would have taken you to get the controller of the account to give you a signed message. It might be worth the time if you believe posting a signed message would get you more attention, and I believe it would.
Besides all of that, I think FC will show back up, assuming he isn't locked up or dead. I stayed away from AMHASH, as well as most cloud mining services, but never had any bad feelings about FriedCat himself. Just a personal opinion.