Yes to both. 

If you edit your "directory" (manage films from the film page) you have the option to delete.  If you check my filmology youll see i deleted my first glitched submission.  I cant remove the deleted entry but.

Second, when you submit a film you can set violence and language advisory warnings from mild to off the planet (i dont think it says that, but it should:)  ). The wizard guides you through this.  No tricks needed.  Its always been there, you just didnt motice it. 

All this is assuming its not glitched.

We've discussed deleting old films from the directory a lot in the past. As far as I remember, Smeagol said he thought it was a bad idea, as seeing a filmmaker grow can be interesting and so forth (it was a little deeper than that, but it's late where I am and I meant to go to bed 3 hours ago). Other people, like Max Butcher, were in favour of deleting old films. However, I think final say resides with the mods and admis. My advice is ask Smeagol if your film can be deleted, and if he says yes then ask one of the mods to actually delete it. I would go ahead and delete whichever film it is for you right away, but I can't 100% remember our policy on it. I think this is something we need to properly quantify, in the rules of the Releases forum.

So yeah, ask Smeagol and if it's okay with him, ask me to delete your film and I will to the best of my ability.

As for content warnings in forum posts, it's something we can work on but I haven't heard any plans to add them so far. However, it's a stonkingly good idea, especially since a lot of people view films here from their forum thread rather than directory entry. Mention it to Smeagol when you message him about the film you want deleted, and if he feels it's a good idea (which I'm sure he will) then he'll likely pass it on to the guy who does the formatting for the forums.

"Nothing goes down 'less I'm involved. No nuggets. No onion rings. No nothin'. A cheeseburger gets sold in the park, I want in! You got fat while we starved on the streets...now it's my turn!" -Harley Morenstein