It's a good suggestion, but I think at this point I have posted so many one-shorts that it would take too long to remove them and put them into to one book (and I wouldn't want to leave the ones I already posted out, because that would make me feel weird.)
I like the control I have over them as individual works, and being able to tag all the warnings as appropriate (particularly with the mature works). It removes some of the risk that someone might skip the preface at the beginning of the works and then read something that maybe they shouldn't.
But I thank you for reaching out with your suggestion so kindly.