Good point about prepaid cards. Like anything of this nature, a lot depends on who you're hiding from and why. It's one thing to thwart generic big corporation knowing where you've been and what you've bought. It's another to be hiding from someone who has some degree of access to your computer and financial accounts. It's still another to be actively hiding from individuals or entities with varying degrees of law enforcement authority and varying degrees of interest in tracking you down.
Privacy.com offers an easy way to spin up virtual cards. Keep in mind your bank (and cc processor, and/or the merchant) probably sells your transaction history, etc. to Google and other big data perverts.
