I don't really care, but I think it's stupid to prevent it. The block on them and grenades in BO is stupid. They only land in a general area, so just don't go to that area at the beginning. It's like walking into the open where you can be sniped across the map, you just avoid it. If you do tube across the map it is funny when you get 3+ people though, I used to do it sometimes on MW2, especially on Quarry.