1) The icons look OK. Racism one's a little weird but the others are pretty straightforward.   2) Yes, they're clear.   3a) On Archive of our Own people will sometimes add a warning tag for 'gross-out' content (doesn't have to be sexual or violent, just dealing with bodily waste and/or vomit and the like, or nasty/rotted food). Anything that would be a bad idea to read while eating. An icon like a slime splat would work for this.   3b) Slavery/mind control could be its own warning as well (with a chain icon).   3c) One more potential warning topic: torture. Sometimes this one is counted separately from 'regular' violence as it is a very specific kind, and one that many find disturbing. The icon would be something associated with pain. Maybe knives?   4) Color probably. Blue or green (mild warning) and red (major warning). Major warnings would have 'contains serious so-so' as their tooltip description.   5) Mild = anything PG-13 or below. Major = anything R or above.   Good idea for articles. I have a few things that could use a warning system like this, although I haven't figured out how that could be applied without it getting in the way.   PS. this is one funky font you have here!

Thank you for the detailed feedback! These are very helpful suggestions. I've had a look at the icon libraries, and these are the icons that seemed to fit best for the new topics. I also chose a new one for racism. What do you think?
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Regarding the font here: Is it readable? I'm still not entirely happy with it, especially when it comes to text in all caps.

Yeah the racism one is really clear now. I like the one you chose for the torture warning. All in all it looks pretty good now!   Since you're using RPGAwesome icons, I saw one under the magic category you could also use for the gross-out warning: 'ra-gloop'. Either works though.   The font is a teensy bit hard to read but it could be fixed by making it just a little bigger or something. Is it a LotR-styled font? It looks like the writing on the One Ring. It's kinda neat.

Thank you! I thought about ra-gloop, but personally I think it's harder to identify at a glance.   The font is called "Tangerine", so I don't think it's related to LotR - but yeah, now that you mention it, it does look kind of like that writing. I've tried making the font bigger and reducing its weight - is that easier to read?

Somewhere between the font weight you used to have and the weight you have now would be perfect, I think.