It's not a term I use much for myself, but I understand the temptation to. Sometimes we run into things that seem unlanguageable in their horror. It can be difficult--impossible, sometimes--to find words that carry the weight that their referent deserves. Especially when the more accepted parlance seems sanitized--Carlin has a great monologue about this. He talks about how "shell shock" (A vicious term, it sort of bursts from the lips, kind of like guns themselves) morphed into "Post-traumatic stress disorder" and then into PTSD--a term that puts decidedly more distance between the person and the trauma.

So, yeah, I can understand referring to one's own demons. I've (privately) used dramatic or religious vocabulary when thinking about my own neuroses. It's sort of hard not to, when you feel damned.