I understand that you should not be thinking about Torah while in the bathroom. I assume that existing Mi Yodeya questions would be considered Divrei Torah, b/c people have been discussing Torah ideas (for MOST of the questions, that is.)
However, a question that has not yet been posted, maybe is NOT in the category of "Divrei Torah". After all, the question might be rejected, it may be off-topic, etc. So, maybe it is permissible?