Forum programmers do have an appalling tendency to make their class and variable names opaque or worse, ambiguous. It gets really frustrating trying to navigate among things named as unhelpfully as x1, x1a, and x2. The worst part is that some of the classes might only be used once on the entire forum, or in an obscure area available only to moderators (or never, depending on the settings of the forum), so hours spent scouring the site after commenting something out may yield no results. Or the results might not be apparent for days or weeks, only emerging after a setting was changed, by which time it is almost impossible to remember what was commented out/edited earlier. To top it all off, the files tend to be wretchedly documented, if they are documented at all, peppered with vague comments that do little to elucidate the code.
I don't know what would be so hard about naming classes and variables explicitly enough that anyone reading the files could figure out what they do without consulting a manual. Yes, it might mean a little more typing, since the variable names would be longer, but as my father likes to point out, most of programming is just cutting and pasting anyway.