So you do keep guest accounts? In this case your security advice is appreciated but, I am afraid, is going to be ignored :)
> Peek in on any of those communities and you'll be hard-pressed to find the caliber of technical skill required to engineer actual exploits.
I am curious: so who, in your opinion, has been making all the CFWs for Xbox, Xbox 360, PS3, PSP, Vita, 3DS etc? Who made modchips, dongles and flashcarts for other systems? Who cracks PC releases? Space aliens? People eager to run Linux inside Call of Duty? People who need to run their website off a 3DS?
Most piracy users are dumb kids but it does not mean all people in the scene are. You only need one person to exploit the system and then the whole world can just copy the method.
>Remove the necessity of an exploit for running the interesting use cases (even an "Hardware will be opened up after 1 year of sales" promise as suggested), and suddenly the actually talented people are doing more interesting things than trying to assault your security model.
Why should anyone believe this? Do you have anything to support this claim? Here is an idea: if you are really running systems with enabled guest accounts as you implied - tell the board where they could be found. I am sure nothing bad is going to happen :)