I feel that there is a growing number of questions that consist of pictures. Most of these questions are homework questions such as this one.
Images are not searchable. Furthermore, often times these questions lack any keywords that may help future users search for these questions. Nevertheless, I do understand that new users may not be familiar with tools to write out equations (myself included....). In addition, some questions cannot be asked without pictures. One example would be questions on nomenclature.
Can picture questions be closed on grounds that they are too low quality?