Hiding spots dont really exist in Halo...even in Reach...when people sniped, you could always figure out where it was coming from. Even if the killcam shows where you are hiding, you can use that as bait, wait for the enemy to go for your old hiding spot and kill them. And its not hard to figure out tactics in Halo, "oh he used a rocket launcher or shotgun to kill me"...Killcams just provide an understanding of how you died...so people stop thinking the other player is cheating or modding etc. killcams are not a bad thing, use them to your advantage (when killed, and when killing as bait). Not that hard to do