Do mods actually delete retaliatory feedback?

First this guy hotstuff gives me a neg for negging him on deadbeating. His comment is: read the forums for my excuse n00b. This is not deleted.
Then this guy jonmc sends me this PM "If you could please remove your negative comment I would appreciate. If not I will provide a review for you that basically says that you are a sore loser and being too emotional. This will be your forth comment to that effect. Maybe you just need to chill out a little bit. Your results and your score would be much higher if you don't get so emotional."
I don't remove my neg since I stand by it and he negs me.
Then there was this guy jhern who clearly had a secret alliance (if you look over the game, they shared borders in a 3 way game in 2 places for continents. They both left 1 guy on each of those borders and never attacked. They were also in several other games together). I give him a neg and after that he gives me one. Shocking.
It seems like no one is able to receive a neg without giving one back. It's all retaliatory and the mods don't seem to do anything.
Then this guy jonmc sends me this PM "If you could please remove your negative comment I would appreciate. If not I will provide a review for you that basically says that you are a sore loser and being too emotional. This will be your forth comment to that effect. Maybe you just need to chill out a little bit. Your results and your score would be much higher if you don't get so emotional."
I don't remove my neg since I stand by it and he negs me.
Then there was this guy jhern who clearly had a secret alliance (if you look over the game, they shared borders in a 3 way game in 2 places for continents. They both left 1 guy on each of those borders and never attacked. They were also in several other games together). I give him a neg and after that he gives me one. Shocking.
It seems like no one is able to receive a neg without giving one back. It's all retaliatory and the mods don't seem to do anything.