This is a proposal for a sort of a middle ground between the image hosting and the LaTeX sandbox.
I have lots of bits of LaTeX code lying around in my files, and every-so-often a question evokes an answer from it which I sometimes accompany by: "I could provide more details if asked"; by which I mean, "I've got the code, it's a bit of a mess, I've been meaning to clean it up, and if someone provided the incentive by actually asking then I'll clean it up and make it public.". Normally, "make it public" means "stick it on my website" since nothing is really enough to fit into a Proper CTAN package.
Also, once or twice, a question gets me interested beyond the initial answer and I wonder, "What is really the best way to do that?" and I end up with something a little more complicated than I would really want to put in an answer, and it wasn't necessarily quite what the original questioner asked for, but still would be useful to someone interested in the same question.
I'd guess I'm not alone in that.
So I wonder what people would think of the idea of having a drop-box of some sort somewhere where people could stick snippets of code that didn't quite fit in an answer for some reason, but were still relevant in some way.
(In all fairness, I should say that I'm not completely convinced myself; but I can't think of a definite reason either way.)