Spawn-killing is illegal server-wide, but seeing how only SK and awp_map are the maps where this applies, it shouldn’t be necessary to put the rules in the MoTD.
With SK/SK3, etc you cannot kill someone a second after the round begins. That is spawn killing, as you both have just spawned and you immediately shoot him. It is immensely *edited* and unfair and should be slain and removed later as well if it continues.
Also, you were banned under different speculations and not just “playing good”.