They've underpaid Infinity Ward employees promising them royalties if Modern Warfare 2 does well.
Now despite MW2 doing well, they are witholding royalties.
They've fired the two studio founders, and the studio founders are suing them for breach of contract.
The new MW2 map-packs are being released for a price-gouging $15.
Activision is pretty bad, I think I'll avoid paying them any more money.