Update the maps with little indestructible turrets that are on around the respawn rooms that cant be hacked, but are there to stop spawn campers like a deployed gunner with a support or an assassin who jumps on top of the respawn room and shoots at the moneyball when it's weak, but it only covers the upper floor (since that's where the respawn room is).
I think it's a bit of a noob tactic. Spawn camping is wrong in any game and it shudnt be allowed. It ruins it for the other team and it's especially cheap if it's being used as a perch to bring the money ball down.
There's also Assassins who jump above spawn and camp there with lever 3 cloak spamming ninja stars at turrets and the moneyball.
I do this as Assassin and I even think it's annoying... so I know how annoying it is especially when they juice on the moneyball from above the spawn. Also, people shoot me when I do it, but I just run back there and do it again. Another good idea would be to have the burners that are on the celling of the buildings in some areas of the maps and put those on the spawn to at least stop them.