I can't imagine the cops face when busting in on what they think might be the pot bust of the year only to find a miner and his giant computer 
To be honest, if someone asked me what i was doing with this, I would probably say "Search for Aliens, did you ever hear about the SETI project? And of course have my main computer ready running Folding@home or SETI@home
Im not sure if I should go with SETI oder Folding here... the SETI thing sounds a little more nuts. The other thing on the other hand is something people won'T comprehend. "You are folding proteins? What the f*
!" when I was shopping for parts at Home Depot, a nice girl working there was helping me get my random list of parts. I told her I was protein folding and explained how that worked
I will probably continue to do that, and sound quite a bit more altruistic than reality