I'm actually sick of the whole "hardcore" label (and its insidious evil twin, "casual"). I've seen both of them used by just about everybody imaginable, almost always incorrectly. Let's see what Merriam-Webster online says.
Hardcore
Main Entry:
hard–core
Pronunciation:
\-ˈkȯr\
Function:
adjective
Date:
1940
1 a: of, relating to, or being part of a hard core <hard–core poverty> <the hard–core unemployed> b: confirmed , die-hard <hard–core rock fans> <a hard–core liberal>
2 of pornography : containing explicit descriptions of sex acts or scenes of actual sex acts — compare soft-core
3: characterized by or being the purest or most basic form of something : fundamental <a room gussied up in hard–core French provincial style — John Canaday>
Casual
Main Entry:
1ca·su·al
Pronunciation:
\ˈkazh-wəl, ˈka-zhə-wəl, ˈka-zhəl\
Function:
adjective
Etymology:
Middle English, from Anglo-French & Late Latin; Anglo-French casuel, from Late Latin casualis, from Latin casus fall, chance — more at case
Date:
14th century
1: subject to, resulting from, or occurring by chance <a casual meeting>
2 a: occurring without regularity : occasional <casual employment> b: employed for irregular periods <a casual worker> c: met with on occasion and known only superficially <a casual friend>
3 a (1): feeling or showing little concern : nonchalant <a casual approach to cooking> (2): lacking a high degree of interest or devotion <casual sports fans> <casual readers> (3): done without serious intent or commitment <casual sex> b (1): informal , natural <a casual conversation> (2): designed for informal use <casual clothing>
Sky Render - Sanity is for the weak.