http://www.bmeink.com/A80220/high/npsq-cameron-mark.jpg
From the caption, this tattoo (Feb. 20, 2008 in BMEink) with the characters 火目論真開 was evidently supposed to represent the name Cameron Mark, but I think it falls a bit short of the mark, so to speak.
Now, there might be “cute” ways to represent English names in Japanese using kanji instead of the traditional katakana. For example, Cameron in katakana is カメロン [kameron] but this might be a bit boring so some people might write 亀論 (which is similarly pronounced kameron) for a play on words meaning “Turtle Theory.” If you like turtles, why not?
But in our example火目論真開, using the characters 火目 for [kame] is really “forced” because this is a strange combination of different types of readings of characters. The 火目論bit could be something of a lame joke meaning “Tuesday-Thursday Theory” (火曜日 is Tuesday and 木曜日 is Thursday) but then it must be read Kamokuron not Kameron and is no longer a play on words.
And to top it off, 真開 cannot be pronounced anything close to “Mark.” The character 開 is definitely wrong. 真開 could conceivably be read マカイ [makai] but not マーク [ma-ku] which is the Japanese equivalent of the name “Mark.” In fact, 真開 is a rare Japanese surname read しんかい [Shinkai].
So the guy has managed to name himself Kamokuron Shinkai.