At least once a week I get into a team death match on Galactic Star Fighter and the enemy team sits in front of our spawn and snipes us. So my suggestion I think is fair. Place a zone with X meters outside of sniper range that if an enemy enters they blown up and the opposing team gets a point (that last part isn't necessary but I think it a proper punishment). With that buffer zone players can spawn, read the field, and maneuver a bit before the threat of death. The most important part is, if you do decide to take my suggestion, when you implement it don't tell anyone. Let the spawn killers figure it out the hard way, I feel that it would help make up for their taking the fun out of the game for players who want a fair match. Either way, thanks for reading and let me know what you think!