Say, a drawing doesn't have death in it, but does imply it or there is death in a comic series, but it hasn't happened yet. It cannot be tagged death and thus it cannot be blacklisted. I think all sensitive subjects should have a lore tag for the purpose of blacklisting it.
Take as an example:
death_(lore)
vore_(lore)
murder_(lore)
rape_(lore)
Or, at the very least, many of the implied_* tags should be unaliased. implied_vore and implied_death for example.