I think the various brand-specific fora need to be split up a bit more. Maybe have Lens caps, 49mm-58mm, Lenscaps 62-77mm, and Lenscaps Over 77mm to 122mm. Also add a Manufacture's Flash section, as well as an aftermarket flash section, plus Radio Frequency and Infrared Flash Triggering sub-sections. The ***more*** subsections there are, the more the responses will be uh...well, uh...compartmentalized.
There also needs to be a Polarizing and Neutral Density Question Section, as well as a camera-maker neck strap vs aftermarket neck strap sections, so that would be Canon, Nikon, and Sony straps, then the various aftermarket straps, for a total of four sub-sections devoted to neckstraps.
Sound good? I mean "Canon accessories, Sony accessories, and Nikon accessories" just does not seem to be specific enough. By adding lenscaps, filters, flashes, and neck straps, in BOTH camera-maker versions AND aftermarket versions, the accessories sub-categories will be totally blanketed, and each and every question will have its proper place, and there will be a proper place for every question!!! Just like in the military!