As long as we're playing that game, what if they splice open the power
cable and attach their own source so that they can untether it from your
outlet, then take it back to their lab where they can use ultrasound to
find the case sensors, then cut around them?
Seriously though, there is often a cost factor in making security
decisions, and I would like to think that so-called "secure DIMMs" that
are designed to quickly empty themselves upon power loss become prevalent.
Extraction could still be possible by carefully applying the right power
to the right pins while removing the chips, but at least it wouldn't be as
easy as the attack described in this paper appears to be.