Good question. A player/commander's ship should be subject to destruction for blocking a port/starship base "mailslot".how can you block a port without a proximity violation?
In the incident I recall reading about, someone with a way-modded ship (modded as in "cheat") did the blocking and his ship could not be destroyed. This was done to make a point to FDev.
That's my recollection. Anyone please correct me if I am inaccurate.