I have sympathy for the guy, but there's really not much he or Facebook can do here. The only real thing Facebook can do is put some kind of auto-flag on accounts with that name (both "variants" of it, I guess) and check each case to make sure it isn't someone else who coincidentally has the same name. But are they willing to expend so much effort on someone who doesn't want their services? Facebook has demonstrated an interest in weaving itself thoroughly into people's lives wherever possible, and you'd think it would go against their business interest to put in that kind of effort.
The only real solution I would be able to offer him is to make an account himself--a real one--and never use it (much like I do with my account these days). That assumes, however, that Facebook has some means of verifying that someone is not an impersonator and is in fact the real one. I'm no expert on that--do they?