1. Camping is a great strategy that works for all skill levels- Tryharders are all over every COD- Head Glitching you can blame on map design- Spawn trapping = stat padding.
2. Easiest way to find players on the bigger maps is to just get killed.. you will spawn right next to them.
3. High damage allows for easier kills.
4. Guard dogs are part of the 'revenge' system designed to lower the skill gap.
5. I have no idea..
But I love a game mode that a friend modded that when you got a kill you flashed on radar every 3 sec, second kill you were solid on radar, third kill you are highlighted like the oracle but solid. This mode is so fun because everyone is always after you. Sadly modes like this do not fit the average COD player's interest.