If a person really, genuinely and firmly believes that they're ''anointed'', it is obvious they have serious mental and/or emotional problems.
This is not to be startled of, though. The 2.000-year-old history of Christianity is full of people who had a 'special channel' of communication with God. Many of those (prophets, mystics, fanatics, recluses, monks) were really serious cases.
The only case they *don't* have mental/emotional issues is: (a) they pretend, (b) they are made to believe they are anointed. Example: a Nethinim/Helper in Brooklyn progresses on to be part of the GB. The existing GB imply that he may have the potential. So what does he do? He HAS TO become anointed in order to go up the last step of the ladder. Hence, he is made, or pushed, to believe he's anointed; just as a special pioneer's wife, in order to progress further, is pushed to believe she does not want to have children. (Note that all of the existing 8 GB members are former Nethinim, belonging to the 'other sheep' until (relatively) recently.)
To be fair, the case is similar (if not worse) for other religions as well, such as Pentecost & Evangelical, who *all* profess to be anointed.