What we need is a workable/working keyword system, so that rather than throwing things into a catch-all "off topic" bag, each post can have keywords that indicate the topic. New posts would maybe have the 'Perl' keyword selected by default. :-)
But lacking that, the stand-in is, and has always been, the free-text title of the post. It's quite effective. "Keyword searching" works very well indeed (if not 100% perfectly according to 100% of monks' wishes).
I reckon we are the only monastery ever to have a dungeon stuffed with 16
,000 zombies.