i think it's a bad idea.
it will be like
"HAHA! you'r lower than i am! you'r a n00b! p-o-s-e-r!"
or smth close to there.
and besides- definy metallian?
i've always thought of "metallian" as a person who listens metal.
yes i know- it's not music. it's a lifestyle.
but for myself- i listen to metal. and i somewhat live like a metallian.
(sex, beer and bikes.

) but that doesn't mean i'd be a bigbrain on metal(as music).
still- i know many people, who just listens to metal. and if we'll take those "levels" in use, some pople will just get critizised and pushed to the level usually called
OUTSIDERS.
i know- it may not happen in days. or weeks.
it may take a few months.
but this will happen.
life has shown it to me allready.
don't say you haven't been worned..

(<-- i love that smilie)