Drider really, REALLY needs to be a species tag. And for those of you who never played D&D, you're horrible yes, Driders are a species.

And drider needs an implication to insectoid, as driders are insectoids.

On a side note, while tagging is fun, there is a limit to the amount of tags one person can edit in an hour. More people need to start tagging driders and insectoids more often.

Also, if there is a specific forum I should put things like this on, sorry for not doing so. I hardly use the forums, so I'm not that familiar with where what should go.

do we even have posts containing driders here? and how you can tell the difference between drider and some random spider taur?

That's a good question.
Drider is traditionally a dark elf/spider hybrid from various tabletop RPGs, but judging from the Google image search results, it's now widely used for all kinds of spider/humanoid-hybrids.

And we don't currently seem to have any other tags for spidertaurs, so I suppose tagging them as drider is better than no species.