While pictures sometimes are worth a thousand words or more, most of the pictures I see in forums are not, and they usually cost more like 2-50 thousand words (8-bit bytes) of data download. Also, they are often "borrowed" pictures or using "borrowed bandwidth."
In the rare case someone here wants to post a picture, they usually link to one at their site. Works for me.
Finally, this is one of the most dynamic, alive, and visually appealing forums around!