People already mentioned that shit a year ago.
This is not a prank on a bitcoin forum, that's real life. When you lie to the authorities there will be serious consequences. Is there anyone who lied to the FBI and still got away in history? Sure. the question would be, is it worth it?
The amount mentioned in the OP was $3m at that time (216 btc, $15m now), is it worth going to prison to save $5m tax monney?
Would ya? Would yaaa?
Also don't do post bursting (post one after another without someone else says something first), that's against the forum rules.