OleOle, good points.  I do want a safe society and am a law abiding citizen.  I'm also concerned about Eric Holder setting new records for prosecuting whistleblowers, seizing AP phone records, and in other criminal enforcement, DOJ occasionally seeks to defeat anonymity.  But I don't mean to distract from my fundamental bitcoin question, which is why some advise transferring between wallets after a bitcoin acquisition is a matter of good security practice, presumably to defeat hackers.

All I can figure is that the sentiment there is that the hackers will go on to easier prey.  Let's face it, there are consumers who "fall" for all kinds of scams (from the Nigerian prince whose fortune awaits your banking info to your acquaintance stranded in a foreign country who needs financial rescue).  So I guess there is plenty of low-hanging fruit for BTC scammers.

Anybody see other rationale for this advice of moving bitcoin to a new wallet?  (As an example, one of the places I have read this is in a "trust no one" three-step security strategy recommended by dacoinminster here.)