I just came acroos my first dungeon in Minecraft, and already the Spawner is giving me problems. What would be a quick way to destroy the Spawner? All the wiki mentioned was ways to trap mobs.
Use torches to block out the spawner, it prevents mobs from spawning. Put them adjacent to the block itself.
I find spawners to be excellent exp farms, and you can turn yours into a mob farm.
To break one, use a pickaxe, preferably Iron level or higher.
EDIT: It's also generally best to place torches surrounding the spawner, as spawners spawn their respective mobs in an 8 block radius I believe, so surrounding the room with torches is generally extremely effective
A quick and easy solution is to blow it up.
I once tried building a mob farm in a mine when a few creepers ambushed me and blew me to kingdom come along with the spawner. [ :( ]
I always surround them in cobblestone, just in case I want to harvest later.
Pop torches all round to dissuade spawning, then build walls, ceiling and a floor.
When you want to harvest, build your grinder below and then knock out the floor and remove the torches.
And then run away :-)