A mod on the GIS site made the same suggestion recently (see the comments to http://gis.stackexchange.com/questions/3980/how-to-do-stereographic-projection-conversion-w-r-t-changing-point-of-projectio/6522#6522https://gis.stackexchange.com/questions/3980/how-to-do-stereographic-projection-conversion-w-r-t-changing-point-of-projectio/6522#6522). Like the photography site, that community contains some who are mathematically oriented but most are not and most questions do not need any math to answer. Thus, my response there might be pertinent here:
I have thought about this for a while and would appreciate [TeX] support, but have held back with the suggestion because the TeX escapes ($ and $$) can surprise people who are not familiar with this mechanism. It would be nice if we had an option to turn the TeX support on or off for individual replies or threads, possibly by means of a specific tag ("math", perhaps).
Apart from this issue with escapes, though, I (for one) would welcome the ability to use TeX on the occasions when a mathematical formula would improve a reply.