Short Answer. That sometimes it feels like this:
WARNING THIS EPISODE CONTAINS BLOOD, SELF HARM, GORE CAREFUL CAREFUL

And ends up being a page with a panel like this

Now seriously, i think it's a limitator, it's annoying, it shows fear of the author from what's he's writing, and 90% not even used propetly, in tv, there could be a FULL episode about phyisical abuse, the whole episode is around that topic and at the end they will put something like "if you feel depressive, harmed… etc call this number etc etc" "if you have suicidal... etc etc", but that's… when you dedicated a full episode talking about the bad things from it, a full explanation, a dedicated story. The properly music, the properly acting, dialouge, it's sometimes raw, and very reflective…
But when you put a warning in a single chapter that is a 3 pages chapter and one of the characters just said "i'm so dumb, maybe i shouldn't exist", bam a whole page warning "CAREFUL CAREFUL, THIS EPISODE CONTAINS SELF HARM, CURSING…"
It takes you away from the inmersion you're having because it's really not that necesary, you even laugh about what was that ""BIG"" thing the creator was talking about, it shows a weak creator that feels like people will critize him, not the story, and that's the problem with this cancell thing in fiction stories, people focus on the creator and not the story. You don't need a advisory because the character said bitch
"I wILl ofFend pEople, whaT theY Will thInk Abou MeE"
No, that's the character, the character isn't you, the character said bitch
- Doesn't mean you said that to people everyday
- Doesn't mean you hate women and objectify women
- Doesn't mean you're mean …. etc etc
I recived a warning from tapas, they put my episode for mature audiences because it shows nudity, ok, if it was for me i wouldn't put it anyways xD, but it's ok, i get it, it's a very good reason in a lot of public-big-audience websites like this.
But i've seen series, here, with a big warning at the beggining and i thought "oh wow, maybe i'm sitting next to the new Manhunt / Cannibal Holocaust and it's just a page where a character got hit on the table, or coughs a little bit of blood. Sad, because it mostly comes from the community comics
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Ok, that's what i think, because you asked, but now for you, that's part of your question too. Since you didn't say what was that thing you think could deserve a disclaimer, because of spoiler, it's difficult to say if you actually need it, but if it was me, i wouldn't put any warning, unless tapas put it on my chapter. I'm totally against censorship and freedoom taking away creativity. So i don't know your story, but unless it's a total description of a brutal gore scene or rape scene, a very deep (very well constructed) suicide character and a good arc made for it. I don't see a warning necessary. Mean Girls has a scene where Regina is run over by a bus, the movie it's PG13, funny thing, if that was a tapas scene, excactly the same, same characters, same story, they will put the Big-full page warning in red letters it's +18 careful.
Abuse (physical/ emotional) is a big word, and should be taken with tweezers, because the villain is manipulating the main character to kill his wife in a fictional (very fictional) story with magic or anything that doesn't resembles the reality of a grounded abuse in real life, doesn't mean you should put a warning for it at the beggining of the episode. Outside internet we have PG13, PG18 etc. But i didn't recived a big screen warning at the beggining of the episode that said that there will be emotional abuse in a single hannibal episode, or the walking dead where a character will die in a gory way. I just knew that the series was +18 since i bought the dvd or saw the classification on internet, the streaming app, or whatever.
We hate the so named cancell culture, we hate seeing things censored or corrected in our favorite media, but as creators we shouldn't contribuite to this thing to grow and make a broken nail a big deal for our audience, that's treating your audience as dumb people.
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And this, at the end is just blablabla, what matters is if tapas care, so again in my opinion, go ahead if you think is not necessary, maybe tapas doesn't see it as bad either, if not, well, they will put the episode for mature audience anyways, you'll recive less views probably for some reason until the next chapter, and back to normal after. If they don't censor the episode, well your audience won't even notice probably, even like it because of how good your story is, and how it's going even with the mature things.
And this is my golden advice, it's your story, DON'T CHANGE IT because a website say so, you put the limits, yes, you can attatch to certain rules of course, this case, tapas, but if you feel like your story should be a certain way, take a certain path, trust that