Ok hear me out. If a whale wants to announce a pump anonymously, he can make a long expensive post on
http://bitcoinmegaphone.com announcing the date and time.
If the post is long enough (ie, expensive enough) people will know he's actually a whale and is serious. Then the post's permalink will get spread around the internet, helping to ensure the pump has a good chance of happening.
Thoughts?
This sounds like a self-plug for the site... because in the real world this wouldn't matter at all. Someone could just as easily sign a transaction from a wallet with thousands of BTC and post it on the forums.