I have to ask "why"? If the issue is storage/bandwidth, Then say so and put in place appropriate restrictions.
As far as images getting buried, that sort of problem comes with the territory - 16000+ images in the last 30 days - DANG! Images in the last 30 days: Bryce- 1764; Poser- 5283; Fractal- 2138; 2D- 1883; Photography- 1550; etc. etc. verses Beginner- 206; Amapi 3D- 15; Hobbyist- 25; WIP- 92; etc. etc.
Post to a popular section and get buried; post to a lesser popular area and get longer exposure.
The old saying goes "One person's trash is another's treasure". Don't put down someone else's efforts just because it does not meet your standards. On the other side of the coin, folks posting images should strive to make each newer image better than the last (self-improvement) and when making incremental improvements to an image, pull the older, less refined image and replace it with the newer, better image.
Just my 2 cents worth.

Didn't you know that beauty is in the eye of the beholder. That's why eyedrops and rose-colored glasses are needed.