When using the search feature, tag stuffing can make the feature all but worthless. For example this post:
https://forums.d2jsp.org/topic.php?t=98836757&f=268&p=636158486#p636158486 has a tag list which includes these tags: caster, gg, gosu, gg, godly, Jah, Ber, sur, lo, ohm, vex, ist, Mal, um, pul, enigma, fort, grief, rune, griff, Griffon, lld, looking, Iso, rush, infinity, merc, charm, jewel,
Many of these tags are completely unrelated to the item being traded/sold, but will cause it to pop up in irrelevant searches. A rough approximation of which tags are invalid is: caster, gg, gosu, gg, godly,
Jah, Ber, sur, lo, ohm, vex, ist, Mal, um, pul, enigma, fort, grief, rune, griff, Griffon, lld, looking,
Iso, rush, infinity, merc, charm, jewel.
--- All of the bolded options are tag stuffing. So now if I search for any of those bold terms, this post shows up. If enough people do this, the search feature because more of a hassle than it is useful.