its not just one.
its actually like 20 of them (or one guy with 20 accounts), who all spam the same discussion 3 or 4 times until the spam filter activates and blocks any new discussions from them.
however, since its more than 1 account, that means each account of them is able to spam the discussion until the spam filter takes that certain account down, leading to a huge overall spam.
i personally think it has gotten better though.
i remember when every night i logged in here the first 6 pages of "general discussions" were just these spams.
btw, if you wonder what they say:
they are trying to sell fake diploms of universities in japan / china.
like anyone here would even consider buying one of these...