The system works pretty well, but honesty I've been considering this for a while now.
The system changes sexuality tags to their corresponding tags but a lot of people, usually newcomers, tag using the older tags they are familiar with (gay instead of male/male, lesbian instead of female/female, etc). I've noticed that many times when this happens they either a) get confused and try to change it which fails, or b) either don't notice or care and leave it causing the post to become erroneously tagged until someone like me comes along and changes it.
Maybe it's time a new set of tags that could, I don't know, at least attempt to point out the issue?
For example (cuz I know how to find this one the easiest ill use it as an example) gay is changed to male/male.... maybe sexuality tags, gay, lesbian, bi, etc, should get their own tag like "incorrect_tag_(sexuality)" or something? Which would alert the poster (if they actually cared) and others (tagger users) that hey, the sexuality tags aren't correct and it changed it to this which may just be wrong!
I figured I'd toss this idea out there and see what others think, don't expect much in response from me since I've been in pretty bad health for a while now. (Which is why I'm tossing the idea out there, when I decide to try to clean up a little bit on e621 these days I can't do more than a handful of tags or a half hour of searching for issues to solve/report because my health won't let me do like I used to. The gay ones the easiest for me to find issues with, I just type in gay solo and look for images with a single character, no peener in the image, no other smaller images (such as a pc, painting or cellphone screen). Lots of times it's a single character, in an exposing posture or dressing girly, or has cum splattered all over his bottom, New uploader sees these things and automatically tags it as gay, which gets changed to male/male.)
Anyway I gotta go rest now... hopefully this doesn't turn into a shit storm like the last couple forums I've posted lol.
Updated by kamimatsu