Escrow terms:
Both users need to sign a message with the address holding the funds.
No signed message = no deal.
Uh, an escrow here would mean, both of you send 10 BTC each to the escrow, then when one of you wins the escrow sends the prize. I for one don't believe any of you have built up enough reputation not to scam 10 BTC when the time comes
Signed message or no deal.
You give a signed message to the person holding the escrow.
Simple condition.
why require signed msg. when he is willing to send the funds to escrow... Seems like you are avoiding the bet TBH
Obviously if he is going to send the funds to escrow he must be in control of the add (which is all that signed msg. proves), your statement that he could be using hacked funds doesnt get solved by signed msg. But thats none of my business