I am of the belief that Hell should be capitalized because real or not, it is the name of a place, and thus a proper noun. It should be capitalized correct?
I have seen it written without capitalization plenty of times, but I suspect that most of those were just due to laziness or illiteracy (it tends to be written with a lower-case ‘h’ mostly on the Internet–sigh).
Other uses, including expletives seem to use it as a place name as well:
What [in] the Hell‽
Go to Hell!
Google gives mixed results and checking the WikiPedia entry for Hell to get a proper definition does indicate that it is a location, but even on that same page, there are plenty of instances with a lower-case ‘h’.
Is there a situation in which it would not be capitalized? What about uses as an adjective:
that job was Hell?