Frustration
I know how you feel, but the map is set up for shooting into the spawn areas. Here is the first unwritten rule for Palermo. Four flags are set up in the spawn areas, and even if you do not take one of these, it is 'legal' to camp with a sniper rifle or mg and mow people down coming out of spawn. Everyone that plays this map enough learns very quickly to watch it coming out of spawn, especially if the enemy has that flag captured. We throw grenades and smoke from the spawn to clear a path and we have learned to set up mg's in spawn and snipe from spawn, as a defense. The next unwritten rule is that you can nade the spawn when a sniper or mg is set up there. Occasionally someone will purposely throw a nade in spawn, when no defense is set up there. The admins give a warning, and that is all I have ever had to do to make the offender stop.
It sounds like a lot of camping goes on, but this map is won by the fastest moving team. I have watched campers of all kinds, snipers, mg's, assault, etc., many of which are in our top twenty in our player rankings and they get 'their points', but they never help the team take flags for the win. I know every camping place in Palermo, and no one is safe on this map. The team that works together by moving fast wins almost everytime.