You'd think that when I read a story labeled "teen" and says adventure and random, I'd figure it's a random adventure. Not a psychopathic Spike gutting Twilight.
Tags.
Frickin' use them appropriately.

2875808 You can have killings even in Everyone's rating.

If the gutting was just mentioned with one sentance, then that still doesn't call for Mature rating. I haven't read this story yet, so I can't really judge.

Anyway, you can report misstags and the authors will change them.

2877232 I referencing people who actually tag these things as this, and then turn it into Cupcakes.
Like, full on Cupcakes.

2877597 Cupcakes like stories definitely encroaches on Mature territory. I think it's against site rules to misstag stories (the site could lose adds because of mature material), so it's okay to report it.