SpaceX's plan to fly 2 non-astronauts around the moon next year is insanity -- if they're sending 2 flight newbies up there ... this according to another private citizen who went to space. Richard Garriott is a video gaming mogul who spent 12 days on the International Space Station in 2008 ... all on his own dime -- $30 mil to be exact. But he also underwent intense training, and says the so-called "space tourists" paying for the SpaceX better be ready for the worst ... or they won't survive.