A recent meta question suggested closing a popular question soliciting statistical cartoons as being out-of-scope on the site. It is clear that this post does not fall into the written scope of the site, but it is a beloved post with a large number of up-votes. The consensus in the answers seems to be that this kind of question is an aberration that is allowed despite formal breach of the rules.
I really do not want this site to lose questions like this. Rather than just treating this question as an allowable "aberration", another possible resolution is to create an explicit category for funny posts, allowing for a limited number of these posts with strict moderator discretion. This would mean adding a new tag for various funny questions that are popular on this site (e.g., this, this, this) and making it clear that posts will only survive if they are popular. Here is my tag suggestion (duplicated from my answer to the above meta question but with a better name):
This tag is used for posts that solicit amusing or pithy material relating to statistical theory and practice (e.g., cartoons, jokes, quotations, stories, etc.). This category is created to allow a limited number of amusing posts beloved by the CV.SE community, that would otherwise by out-of-scope on this site.
Warning: Posts under this category will be closed by the moderators unless they are unique non-duplicated posts, and show immediate and lasting popularity on the site, as evidenced by high numbers of up-votes from CV.SE users, and highly up-voted answers.