There should really be a sticky of what to do when your account is stolen and how to recover it. Where to send a PM with your bitcoin address. How to sign a message. etc.
Would cut down about 25% of posts in Meta
I am afraid that it won't work.
There is a sticky thread here in Meta section talking about "activity", and another sticky thread in Newbie section talking about the 360s post limit, but we still have people asking about those questions again and again...