Inspired by this "hot" question I posted another question and answer attempting to work out an optimal and seamless methods for embedding data into questions by taking advantage of the fact that Stack Exchange accepts HTML in the questions, and therefore text such as
should be ignored when formatting the question for display, but still be available when editing the question.
That question was meant to be concerned only with the technical aspect, therefore was posted in MmaSE.
Now perhaps the most relevant topic is about policy, and that needs to be discussed here in Mma Meta:
Am I breaking the rules if I embed data in the questions using HTML-like markup?
What would be a good way to figure out the limit in attachment size of a question without abusing the site?