There are 10 pages of images under the humanized tag, all of which depict humans, and very few of which depict furry creatures alongside. I don't want to cause drama by tagging them all not_furry without asking first.

For reference, I care about this because I have "not_furry -rating:s" in my blacklist. When I'm browsing e621, I actually enjoy seeing this:
post #241303

Yet I'd rather not see this:
post #212858

I want to avoid running into porn that doesn't depict furry characters while I'm browsing this site. I have my blacklist set accordingly. I'm willing to put the effort into altering the tags. May I do this? Will it cause problems if I do?

Well, going by the tag-what-you-see rule guideline; if there are no anthro characters and solely human(s), regardless of previous knowledge, I'd tag them with not_furry since it does fulfil the tag criteria

Conversely, there doesn't seem to be any posts tagged as anthrofied not_furry, so it seems reasonable that the opposite would hold true

You may also want to consider blacklisting the humanized tag. There might be the occasional mixed humanized/anthro/feral work but that should generally be rare.

I'm going to start doing some retagging. I'll consider adding a 'humanized -rating:s' line to my blacklist same as I have a not_furry line, but I'll need to spend some more time looking at the humanized section to see if it's really necessary first.

humanized seems like it's not_furry to me.

SnowWolf said:
humanized seems like it's not_furry to me.

But a humanized character might be shown with an anthro and/or feral character, eg. post #233847, so...

Test-Subject_217601 said:
But a humanized character might be shown with an anthro and/or feral character, eg. post #233847, so...

But this wasn't about implications or aliases. :)