My whole point & contribution towards this topic is:
TL;DR Yes, allow such edits to be uploaded and approved, as long as they don't poke a knife into copy rights, IP, etc. BUT have them separated with tags.
Not section, because they will have to reform the whole site then...
Long time ago, when I first got into war3 modding, and did not know jack shit about anything, didn't know what GUI is or 3d Models or tga files, there was a post in Requests asking for a simple potion icon with a few variations (red, green, blue, red & green, red & blue, blue & green, red, blue & green, basically all combinations possible with 3 different potions).
There wasn't anything similar available on THW, so I thought, let's try this?
I followed a tutorial on photoshop, took a potion image from google, didn't work out well. Took a different one, meh, made like 15 different potions and did like a bajillion different sets, took me like a week or so to get some OK(-ish) out. My jpeg was ready !!!! Hold on, that does not work properly in game? Oh, ffs, where's the tutorial section... In the end, put out a few working icons. Guy was happy.
Going into extremes is... ridiculos... let me set the situation for you:
"He killed a lady" "You don't have proof, innocent, let him free"
"He stole a pencil, we have it on tape" "Guilty, Death!"
Let's not forget that CnP(&etc.) are a major part of making a war3 mod (what most people come around for and what the resource section is for, what a surprise...) because if you cannot make some yourself, employ the servises of somebody who can or find something in the resource section, then you are buggered. The only solutions are (That story in first paragraph) to either post a request, and engage all of the religious add-ons of your body that somebody would pick up and carry out OR grab the first tutorial around for something you don't wan't to do, or you can't or you'll never be any good at.
My point is, it took an idiot about a week to CnP + trace + recolour a bunch of small little things, that looked like came out of a grinder at the end. If anybody needs a bunch of potions now, they have to poke one of the icon makers or repeat the whole process while there are (unavailable) resources out there that satisfy their needs.
Also, if you have 0 knowledge of icons, art, photoshop, etc. and you see "Rejected: Not freehand" you are not going to use the resource. There is an expert who's said "Rejected", doesn't matter what "freehand" is, as far as you know it may be a virus.
On the other side,
@Maxwell Have you ever tried freehanding? Do you know how hard freehanding is? (Joking, I am familiar with your works, love them, cant wait for you vs.
@PrinceYaser to complete)
There is so much work & talent that goes into freehanding. It is impossible for some people (me) and I definitely can imagine it hurting at least a bit when you see a beautifully drawn icon next to a... Well, this:
Btw, I still have the potions

(Forum does not take tga or bmp attachments lol)
regards
-Ned