Stop giving them false hopes lol There are several accounts which have provided signed messages from a bitcoin address and they're months into recovering their accounts without any luck.
You don't know that.
I doubt admins will have time to verify ETH signed message.
*Implying that verifying an ETH signed message is harder than a Bitcoin one.*
What OP can do is, provide signed message to a DT member and get that account flagged until it is recovered (which is unlikely to happen tbh)
Why would this help him? The account is already locked. Read the thread.