The Help/Tour page says,
Cross Validated is a question and answer site for statisticians, machine teachers, data analysts, data miners and data visualization experts.
(Aside: Should "machine teachers" be there? -- it's not in the other versions of the tag line.)
What about data visualization novices? Do such users and their questions belong on CV or some existing SE site? If not, should CV invite them or should a new SE site be created for them? Looks like there is a deleted Infographics and Data Visualization proposal in Area 51 in case anyone has enough rep to see it.
On one hand, I like data visualization living in CV because many data visualization issues are tightly coupled to data analysis. For instance, choosing the right summarization level and making valid comparisons.
On the other hand, there are other aspects not tied to analysis, such as choosing a color scheme, understanding efficient layout, software tools, and visual perception.
I ask because I noticed this new site, Help Me Viz, is trying to use the WordPress engine for something similar to SE in this area.