I recently stumbled upon DmRo912's most recent question and found that there was no MathJax where there probably should've been, and so I edited appropriately.
But I then noticed that this was not a new user (member for over a year) and that many past questions of his/her failed to contain MathJax, and it was always edited in by someone else.
How do we deal with users such as these that just don't use MathJax? Especially when failure to do so makes the question harder to understand.
Related: