Hi,
I'm trying to make a wool and XP system for the enchantments coming up in Minecraft 1.0. Cave spiders give lots of XP compared to most other mobs. I looked up on the Minecraft wiki to find out how to disable spawners, and found out it can easily be done in 1.8.1 by placing a torch on the spawner. I found two cave spider spawners relatively close to each other and decided to make my contraption there. After placing a torch on both spawners, (+ lighting up the surrounding area) I went ahead and started to clear out some space. After a few seconds of doing so, a cave spider popped up and started attacking me. I then tried to build and then fight, build and then fight, but found the process of trying to beat the gltich too overwhelming. To make sure the wiki wasn't wrong, I found a dungeon seed and tested to see if simply placing a torch on the spawner would work. Indeed, it did.
Doozie advised me to make a post on the forums.
As for the cave spiders,
On novylen cave spiders don't poison me. They used to. The cave spiders just attack.