Idea for a mod: Allow for HTML color codes to be specified in thread subjects, and allow so that replies will correctly keep this information rather than converting it into symbol codes for the < and >.
I can be sneaky and directly edit the SQL data to, for example, put a specific color, like red, around a significant flag in a subject, but then replies end up with subjects with the HTML code displayed in the text of the subject, rather than working as HTML.